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63 Answered Questions for the topic Sum

Formula for Sum

To save money for a sabbatical to earn a​ master's degree, Henry deposits ​$2100 at the end of each year in an annuity that pays ​%6.5 compounded annually. Use the formula for the value of an​... more

finding an sum equation - Combinatorics

I need help finding an equation for the next formula and getting rid of the SUM sign

12/01/19

Evaluate using Limit Definition

Evaluate1∫(x+x^2)dx0by using the limit definition. (Hint ∑k=1 k^2 = n(n+1)(2n+1)/6 )

08/06/19

mathematics whole numbers

a group of 3 adults and 10 children bought a ticket to watch dance performance. each adult ticket cost $7 more than each child ticket. the group paid a total of $125. what was the cost of each... more

07/07/19

Use the sum-to-product formula to simplify the expression: If sin41∘+sin19∘=sinA∘,0<A<90, then A= ____degrees

please provide all steps for the solution!!!!

05/05/19

I want to find the exact sum of the power series.

I have the power series (n3^n-1)/(2^2n) going from 1 to infinity. How do I find the exact value for the series. I believe that we just use a power series function that we already know and based off... more
Sum Quotient

09/25/18

two numbers have a sum of 44. The quotient of the larger number and three is 12 more than the smaller number. Find the numbers.

two numbers have a sum of 44. The quotient of the larger number and three is 12 more than the smaller number. Find the numbers.

09/14/18

what is the gcf and sum of 15 and 60

15 + 60 The sum of the numbers as a product of their GCF is
Sum

09/11/18

the sum of a and -3 is -4

The sum of a 
Sum

09/05/18

if the sum of twice a number and negative 7 is increased by 8 the result is 16 greater than the opposite of the number what is the number

if the sum of twice a number and negative 7 is increased by 8 through 16 greater than the opposite of the number what is the number

08/02/18

!!!!!algebra 2 question! need help ASAP!!!!!!

Explain why we can have a converging infinite series when 0 < r < 1. Hint: Use "sum of a finite geometric series" as a basis for your explanation.                                           ... more
Sum Law Maths

07/01/18

Sum of direction angles of vector [0,1,0] is?

pi/2, 0, pi or 3pi/2? Also explain plz thank you. 

05/12/18

Calculating upper and lower limits for a linear function

I am asked to calculate the lower limit and upper limit (L5 and U5) for the linear function y=13-3x, between x=0 and x=4.   I have found that Δx=4/5, and that x0 =0. However, I am getting my... more
Sum

04/22/18

It takes a month for a horse, two months for a goat and three months for a sheep to eat a cart of hay.

It takes a month for a horse, two months for a goat and three months for a sheep to eat a cart of hay. How many months does it take for a horse, a goat and a sheep to eat a cart of hay together?

02/11/18

How can I find convergence of this sum, without using the integral test: (sum goes from 1 to inf)

∑(sqrt(n+2) - 2sqrt(n+1) + sqrt(n))  
Sum

01/11/18

sum of two numbers

the sum of two numbers is 20. one is three more than the other. What are the numbers?

12/31/17

Kind of polygon with the sum of interior angle is 900°

Thank you in advance!💙

10/18/17

the conjugate of a sum is the sum of the conjugates of the individual complex numbers

please help I have no idea what this means and I need the work to show how to do it

Find the sum of the arithmetic sequence. -1, 2, 5, 8, 11, 14, 17

A. 56B. 63C. -7D. 20

03/28/17

Prove that these are identities

2cosx - secx = cosx - tanx/cscx
1 3

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