Let a be 1/6 and let b be 1/2. Let x be the sum of the reciprocals of a and b, let y be the product of the reciprocals of a and b, and let z be twice the reciprocal
9,871 results
Geometry Check please
Is the following definition of complementary angles reversible? If yes, write it as a true biconditional Complementary angles are two angles whose sum measures to 90 degrees  The statement is not reversible  Yes, if angles are complementary, then their

Algebra please help answer
Ursula wrote the sum of 5.815 plus 6.021 as a sum of two mixed numbers? A. What sum did she write? B. Compare the sum of the mixed numbers to the sum of the decimals? Please help answer ASAP. Thanks

Physics
Three vectors, each have a magnitude of 30 units, have their tails at the same oint and are directed 120 degrees from each other. Make a statement concerning the sum of these three vectors. a) the sum vector is 0 b) the sum vector is greater thatn 30 c)

Math
Minimizing Sum: Find two positive numbers whose sum is 100 and the sum of whose squares is a minimum.

Math
Two 4sided dice are rolled and the sum is recorded. Determine the theoretical probability of rolling a sum of 6. Hint: You may want to create a dice chart for the sum of two 4sided die. a. 3/16 b. 6/16 c. 2/16 d. 4/16

Math
Two sixsided dice are rolled at the same time and the numbers showing are observed. Find the following. a. P(sum=6) (1,6), (6,1) 1/36+1/36=2/36 b. P(sum=3) =1/36 c. P(sum is an odd number) 30/36 d. P(the two dice show same numbers) ? Can you check my

Math
Which statement about the sum of two additive inverses is true? Select all that apply. A. The sum is 1. B. The sum is zero. C. The sum must be a positive number. D. The sum must be a negative number. E. The addends are the same number with opposite signs.

math
After rolling a sum of 4, 5, 6, 8, 9, or 10, a player must roll the same sum again before rolling a sum of 7. Which sum 4, 5, 6, 8, 9, or 10, has the highest probability of occurring again?

Math
Does the following infinite geometric series diverge or converge? Explain. 3 + 9 + 27 + 81 + . . . A) It diverges; it does not have a sum. B) It converges; it has a sum.*** C) It diverges; it has a sum. D) It converges; it does not have a sum.

Math
Does the following infinite geometric series diverge or converge? Explain. 1/5 + 1/25 + 1/125 + 1/625 A) It diverges; it has a sum. B) It converges; it has a sum. C) It diverges; it does not have a sum. D) It converges; it does not have a sum. I am pretty

math
Luanne estimates the sum of 39 + 15 is about 40 + 15, or 55. Jacob estimates the sum of 39 + 15 is 40 = 20 or 60 which one is closer to the exact sum?

Mathematics
If the sum of the first two terms of a G.P is 3 and the sum of the second and third term is 6, find the sum of the first term and common ratio.

Mathematics
The sum of 8th term of an AP is 160 while the sum of 20th is 880 fine the 43 term and the sum of the 12 term

Math
Does the following infinite geometric series diverge or converge? Explain. 1/7+1/28+1/112+1/448 A) It converges; it has a sum.*** B) It diverges; it does not have a sum. C) It diverges; it has a sum. D) It converges; it does not have a sum. Since

math
A red die and a green die have been rolled. (6 sided) What is the probability of the event? 1.The number on the red die is greater than the number on the green die (Answer is 5/12 but how?) 2. The sum is less than 10. 3. The sum is even. 4. The sum is

maths
the sum of 8th term in an a.p is 150 while the sum of 20th term is 880.find the 43rd term and the sum of the 12term

math
A pair of dice is rolled. Find the probability of rolling a) a sum not more than 1010, b) a sum not less than 77, c) a sum between 33 and 77 (exclusive).

mathematics
The sum of the first 3 terms of a G.P. is 27 and the sum of the fourth, fifth and sixth terms is 1. Find the common ratio and the sum to infinity of the G.P.

Finance
Your trust fund will pay you $100.000 in six years when you turn 25. A shady institute has encourage you to sign over in exchange of cash today. Would you prefer a 8% or 10% discount rate to determine value of lump sum payment ? A. Use 8% the lump sum is

Algebra
Ursula wrote the sum 5.815 +6.021 as a sum of two mixed numbers. part A. What sum did she write? b. Compare the sum of the mixed numbers to the sum of the decimals? Please answer both questions thanks

maths
the sum of the 4th and 6th terms of an A.P is 42. the sum of the 3rd and 9th terms of the progression is 52. find the first term, the common difference and the sum of the first ten terms of the progression.

probability
two fair sixsided dice are rolled and the sum of the dots on the top faces is recorded. a) complete the table, showing the number of ways each sum can occur sum: 1 2 3 4 5 6 7 8 9 10 11 12 ways:1 2 3 b)use the table to find the probability of the

math
Find the two numbers that multiply to the product number and add to the sum number of the following: a)Product 563033256; Sum 51895 b)Product 43481220; Sum 28429 c)Product 2545124358; Sum 105619 I tried xy = product and x+y = sum, but it didn't work

Math
The sum of the degrees of the interior angles of a triangle is _____ degrees What is the sum of the interior angles of a parallelogram ? What is the sum of the interior angles of a rhombus? What is the sum of the interior angles of a kite? What is the sum

math
The no of terms in an AP is 40 and the last is 54,given that the sum of the 15 terms added to the sum of the first 30 terms is zero.calculate(1)the first term and common difference.(2)sum of progression

Calculus
Function f(x) is positive, decreasing and concave up on the closed interval [a, b]. The interval [a, b] is partitioned into 4 equal intervals and these are used to compute the left sum, right sum, and trapezoidal rule approximations for the value of

Math
Ursula wrote the sum 5.815 + 6.021 as a sum of two mixed numbers. A. What sum did she write? B. Compare the sum of the mixed numbers to the sum of the decimals.

Calculus
Function f(x) is positive, increasing and concave up on the closed interval [a, b]. The interval [a, b] is partitioned into 4 equal intervals and these are used to compute the upper sum, lower sum, and trapezoidal rule approximations for the value of

maths
each of the students in a class writes a dirrerent 2 digit number on the whiteboard. the teacher claims that no matter what the students write, there will be at least three numbers on the whiteboard whose digits have the same sum. what is the smallest

Maths
The sum of 1st five terms of an AP nd the sum of the 1st seven termd of the same AP is 167. If the sum of the 1st ten terms of this AP is 235, find the sum of its1st twenty terms

Fourth grade math
What is the sum of the six threedigit numbers that have the digits 1, 2, and 3? What is the sum in each column? Why is the sum in each column the same? my mom doesn't know how to help me with this one?

arithmetic
the sum of the 3rd and the 4th term is 44 and the sum of the 10th and the 15th term is 203. what is the sum up to the 20th term?

Computer science
How to convert from decimal to binary in matlab.....this is what I have so far..... dec = 43; i = 1; sum=0; while dec>0 r = rem(dec, 2); sum=sum+(i*rem); dec=dec/2; i=i*10; end sum

Algebra 2
Dante is making a necklace with 18 rows of tiny beads in which the number of beads per row is given by the series 3 + 10 + 17 + 24 + ... a. Use summation notation to write the series, give i.the lower limit of the sum ii.the upper limit of the sum iii.the

Calculus
Function f(x) is positive, decreasing and concave up on the closed interval [a, b]. The interval [a, b] is partitioned into 4 equal intervals and these are used to compute the left sum, right sum, and trapezoidal rule approximations for the value of

Precalculus
Find the sum of the first 50 terms of the sequence 2,4,6,8........ That is twice the sum of 1+2+3+...+50 For 1+2+...+N, the sum is N(N+1)/2 The sum is therefore 2*[50*51)/2) = 2550

calculus
Find the sum of the series (1)^n (5^(2n))/n! 1. sum = e^25 2. sum = e^−5 3. sum = 5 4. sum = e^5 5. sum = 25 6. sum = e^−25

math
A sum is invested at compound interest payable annually. The interest in two successive years was Rs 900 and Rs 981. Find the sum. If the sum of all internal angles and sum of all external angles of a regular polygon are equal, then the number of sides of

Precalculus
Find the sum of 20 (summation notation symbol)k=1 then (3k5) If you mean the sum of the first 20 terms, beginning with k=1, of ak = 3k  5, that would be 20 x 5 = 100 PLUS the sum of the first 20 terms of ak = 3k The latter is 3 times the sum of

Math
Help pls! I just need to set the equations only, I can do the rest. The qu. Is: The sum of three numbers is 15. The sum of the first, the second, and twice the third is 20. The sum of the first, twice the second, and three times the third is 27. This is

Probability
Two cubes are rolled .both cubes are labelled 1 to 6.the number rolled are added. What is the probability of each out come ? a) sum is 12 B)the sum is less than 4. C)the sum is 7. D)the sum is 2.

Reiny (this was the one you helped me with)
I tried to explain it by using the arrangement of billiard balls, but I guess you don't play pool. let me try to "draw" the billiard balls . . .o . . o o . .o o o . o o o o o o o o o o sum of one row = 1 sum of two rows = 3 sum of three rows = 6 sum of

statistic
Roll two 6sided dice and examine their sum. a) How long will it take to roll "snakeeyes" (a pair of ones)? b) What is the probability of rolling a sum of 7 on the first roll? c) What is the probability of rolling a sum of 7 on the fourth roll? d) What is

math
The sum of 18 terms of an A.P is 504 while the sum of its 9 terms is 126.Find the sum of its 30 term

Math
Find the sum of all 3digit positive numbers N that satisfy the condition that the digit sum of N is 3 times the digit sum of N+3.

Math(arithmetic & Geometric Series)
1)The sum of 6 terms of an arithmetic series is 45, the sum of 12 terms is 8. Find the first term and the common difference? 2)If in a geometric sequence the sum of the second and the third is 20 and the sum of the fourth and fifth is 320, find the common

Algebra
Use the geometric sequence of numbers 1, 1/3, 1/9, 1/27… to find the following: Using the formula for the sum of the first n terms of a geometric series, what is the sum of the first 10 terms? Carry all calculations to 6 decimals on all assignments.

SUMS?
what is the sum of the first towo odd numbers? what s the sum of the first three odd numbers? what is the sum of the first 4,5 and 25 odd numbers? what is the sum of any number (n) of odd numbers? explain your reasoning. IM SORRY I DO NOT UNDERSTAND THE

calculus
find the sum of the series: 1. the sum from n=1 to infinity of ((1)^n*(.2)^n)/n I simplified this to: (.2)^n/n I know this is alternating, but how do I know what the sum is? 2. the sum from n=0 to infinity of 1/2^n Is this geometric with n^(2)? and if

math
this is real hard and i would love some help. In a game of craps, a player rolls 2 balanced dice. There are 36 equally likely outcomes. What is the probability that: a) the sum is either 3 or 8 b) the sum is 6 or doubles rolled c) the sum is 6 AND doubles

college math
I do not understand a problem from a text book or how to solve the problem for the answer. Could shomeone show me the steps (show work) on how to solve this question. The sum of the intergers from 1 through n is n(n+1)/2. the sum of the squares of the

maths
Find the sum of all 3digit positive numbers N that satisfy the condition that the digit sum of N is 3 times the digit sum of N+3. Details and assumptions The digit sum of a number is the sum of all its digits. For example, 1123 has a digit sum of

Calculus
The problem I have is a summation from 1 to infinity for (1)^n/n. I have to find a partial sum that is in 0.001 of the infinite sum, my teacher says the fourth partial sum approximates the infinite sum, which is 7/12. I think to get within 0.001 of the

math
If two dice are rolled, what is the probability that their sum will be a number greater than 5 ? [A]1/6 [B]1/3 [C]13/18 [D]5/6 [E] None of these. i think it is c am i right? 13/18 so i am right? What is the probability the sum is 2,3,4 or 5? If you find

math
The following is a list of 11 measurements: 78, 1, 92, 24, 59, 21, 51, 2, 65, 37, 11 . Find 11 over sum,under sum i=l than Xi over 14 Round your answer to at least two decimal places. I get a sum of 231, now this is where I am confused. Do I divide or

Probability
Two number cubes are rolled .both cubes are Labelled to 6. The numers rolled are added . What is the probability of each outcome? A) the sum is 12. B) the sum is less then 4. C) the sum is 7. D) the sum is 2.

math
find the sum of each of the following infinite series, if no sum, write no sum. 93+11/3+1/9... 1/2+1+2+4...

ALG 2
Find the sum of the geometric series given.....(if their is no sum...state no sum) 3+9+27...

Math
I'm so lost with this problem! Please help!! 1/5+1/10+1/20+1/40+... A It diverges; it has a sum B It diverges; it does not have a sum C It converges; it has a sum D It converges; it does not have a sum. I believe that it is answer choice d, not all

math
Consider an equilateral triangle with points located at each vertex and at each midpoint of a side. (See picture.) This problem uses the set of numbers {1, 2, 3, 4, 5, 6}. Place one number at each point. Call the sum of the three numbers along any one side

algebra 2
An arithmetic progression has 5 terms that have a sum of 200. The sum of the last three terms added to 6 times the sum of the first two terms equals zero. What is the first term?

MATH
if f (x) is a polynomial of degree 3 whose roots are p,q,r. FIND f (3) if sum of cubes of roots is 0 and sum of squares of roots and sum of roots are unit digit of 3^2018 and 5^50666666666 respectively?

Math
Out of the numbers divisible by 3, we picked 4 consecutive numbers. To the sum of these, we added a third of the sum, and then the half of the third of the sum. We got 225. What are those 4 numbers?

Math
The sum of the first and fourth terms of an arithimetic sequences is 2 and the sum of their squares is 20 1. Find the common difference 2.find the sum of the first eight terms of the squence

maths
Let's denote the three numbers by a1, a2, and a3. Consider the third degree polynomial: p(x) = (1 + a1 x)(1 + a2 x)(1 + a3 x) Take the logarithm: Log[p(x)] = Log(1 + a1 x) + Log(1 + a2 x) + Log(1 + a3 x) Expand in powers of x by using that: Log(1 + x) = x

Algebra
I have a few problems I need some help with. The first is Evaluate the sum. 1. There is an E like symbol on the top is 10 on the bottom n=1 and to the right (72n) 2. The next question is find a10 for an arithmetic sequence with a1=6 and d=10 3. Find the

Algebra
Let S(N) denote the digit sum of the integer N. Let M denote the maximum value of N/S(N), where N is a 3digit number. How many 3digit numbers N satisfy N/S(N)=M? The digit sum of an integer is the sum of all its digits. For example, the digit sum of

Reply to grant about a regression problem
This is a reply to the question posted here http://www.jiskha.com/display.cgi?id=1178989522 As I explained there, you can find the parameters by defining: x1 = Sin(0.49 t) x2 = Cos(0.49 t) and treat this as an ordinary linear regression problem. If we

Computer  Programming
Please how can I use WATFOR 77 software to code and run the following Fortran program: INTEGER SUM SUM = 0 DO 10 D = 1,7 IF (K.GT.3) THEN SUM = SUM + K ELSE SUM = SUM * K ENDIF PRINT* , SUM 10 CONTINUE END Oh My!!!! Tell me where they are still using

Calculus
Determine convergence or divergence for the following series. State the tests used and justify your answers. Sum (infinity, n=1) 1/(1+e^n) Sum (infinity, n=1) (2*4*6...2n)/n! Sum (infinity, n=0) (n6)/n Sum (infinity, n=0) (n6)/n! Sum (infinity, n=0)

Probability
Roll 3 dice. What is the probability of getting a sum of: A) sum of 7: 15/216 B) sum of 8: 21/216 C) sum of 11: 27/216 D) sum of 12: 25/216 Are these correct? How many ways are there to choose 3 numbers ranging from 1 to 6 such that the sum is N? Consider

Computer Scienejava
Write a loop that will continuously prompt the user for integers to sum, 1 to exit. Sum these values and display the sum to the console. Here is what I have so far, but I feel like I am missing something: public class Sum1 { public static void main

Math
The sum of 16terms oe an A.P is 504,while the sum of its 9terms is 126.Find the sum of its 30terms

Math
X X2 1 1 2 4 3. 9 5 25 8. 64 10 100 It asks me to do the Sum of X Sum of Squares Sum of X squared Can you please help me on this. I don't get it

maths
i need help with writing expressions A) double the sum of 25 and 8 i think it is(2x25+8) B) the quotient of 15 and 3 subtracted from the product of 4 and 9 i think it is (5/34x9) C) the difference between 20 and 5 multiplied by the sum of 8 and 2 I think

Maths
how would you write the following expressions using numbers, parentheses and other mathematical symbols. 1. Double the sum of twentyfive and eight. 2. The quotient of fifteen and three subtracted from the product of four and nine. 3.The difference between

math
there are 3 numbers, a,b and c. the sum of a and b is 15.31 , the sum of b and c is 9.54,and the sum of a and c is 5.15. find the sum of a,b and c.

Maths
The sum of 1st five terms of an AP nd the sum of the 1st seven termd of the same AP is 167. If the sum of the 1st ten terms of this AP is 235, find the sum of its1st twenty terms

Math
How do you do. Please Explain Sum of X Sum of Squares Sum of X squared

Mathematics
The sum of the first 20 terms of the linear sequence is 28 and the sum of the first twenty eight term is 21 find which is 0 and also the sum of the term preceding it

maths
(Write the following expressions using numbers,parentheses and other mathematical symbols. You do not need to colculate the results) A)Double the sum of twentyfive and eight. B)The quotient of fifteen and three subtracted from the product of four and

Math
Sum of4th and the 6th terms of an a,p is 42 . While the sum of the 3rd and 9th terms of the same a.p is 52. Find the (a) first term (b)common difference (c) sum of the first ten terms of the progression. Solution

math
The sum of first 13th term as G.P. Is 21 and the sum of 21th term in 13. find the sum of first 34th terms.

Math
What is the expected number of rolls of both dice until you get a sum that equals 6? I know that p[sum = 6] = 5/36, but how do I find out: E[# of rolls until the sum = 6] = ? Thanks!!

Random
A room has five corners, one of the five has an angle is 179 degrees what would be the measure meant of the other angle if the sum of two of the unknown angles is 60 and the sum of the other two is 3 less than the sum of the first two. my first question

Statistics
Two sixsided dice are rolled at the same time and the numbers showing are observed. Find the following. a. P(sum=2) b. P(sum=3) c. P(sum is an even number) d. P (the two dice show different numbers)

Math
10.Mr. Cartwright bought 2 7/8 pounds of grapes for his lunches. If he paid $1.79 for each pound about how much did he pay for grapes? A.6 B.3 C.7 D.4 C 17.Omar is getting a new rectangular rug for his room. His old rectangular rug is 2 meters wide and 2.7

math
The sum of the first 5 natural numbers is 15 or (5)(6)/2. The sum of the first 21 natural numbers is 231=(21)(22)/2, and the sum of the first 30 numbers is 465. Use inductive reasoning to derive the formula for the sum of the first n natural numbers.

maths need steve
The sum of 3 numbers is 4, the sum of their product is 5 Find the sum of their cube if the product of there number is 6

C Programming
I am trying to find the sum of two integers. I entered the following program into the Visual Studio and it is telling me that there are errors. Can someone tell me where they are please? #include int main( void ) { int integer1; int integer2; int sum;

Further mathematics
An exponential sequence (GP)of positive terms and a linear sequence (AP)have the same first term.the sum of their first terms is 3,the sum of their second terms is 3 and the sum of their third terms is 6. Find the sum of their fifth terms

C++
Write a MAIN function and a FUNCTION to compute the sum of the below series. ((1)^(n+1)*n!)/(n*n) (from n=1 to infinity) Within the MAIN function: . Read a variable EPSILON of type DOUBLE (desired accuracy) from the standard input. EPSILON is an extremely

C++
Write a MAIN function and a FUNCTION to compute the sum of the below series. (n!)/(2n+1)! (from n=1 to infinity) Within the MAIN function: . Read a variable EPSILON of type DOUBLE (desired accuracy) from the standard input. EPSILON is an extremely small

C++
Write a MAIN function and a FUNCTION to compute the sum of the below series. ((1)^(n+1)*n!)/(n*n) (from n=1 to infinity) Within the MAIN function: . Read a variable EPSILON of type DOUBLE (desired accuracy) from the standard input. EPSILON is an extremely

math
in a Geometric progression the sum of the first and the second terms is 90 and the sum of the second and the fourth terms is equal to 30.find the sum of the first 8th term in the progression

math help
four more than seven times y = ? Eights less than seveneights of w = ? One ninth of the sum of p and q = ? The product of twice b and the sum of four and p = ? the sum of m and five more than twice m = ? the cube of four times y diminished by eight = ?

proof by induction
proof by mathmatical induction that the sum of the first n natural numbers is equal n(n+1)/2 It's true for n = 1. Assume that it is true for some n. Then the sum of the first n+1 natural integers can be obtained by dding the last number n+1 to n(n+1)/2.

Math
Stage 1: 1 = 1 Stage 2: 1+3 = 4 Stage 3: 1 +3+5 = 9 Stage 4: 1+3+5+7= 16 a. Find the next four stages and their sums. b. What is the sum in Stage 20? c. In what stage will the sum be 567? What is the greatest number added in the sum of this pattern?

progra
how would i be able to write a function module for average from this pseudocode and then use it to write an algorithm. Sum integer Num integer Count integer Count:= 0 Sum:=0 Dowhile count

intro to computers
You create a formula in A8 that adds up the numbers listed in A1 through A7. You copy the formula and paste it into C8. What happens in C8? A. The sum of cells A1 through A8 appears. B. The sum of cells C1 through C8 appears. C. The sum of cells A1 through