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63 Answered Questions for the topic Sum

Sum

02/04/15

How many different scores are possible?

In judging a sporting event, there are 3 judges. Each of these judges holds up a number, either a 1 or a 2 or a 3. The sum of these numbers is the athlete's score. How many different scores are... more
Sum

02/01/15

The sum of the original two numbers must be?

I  am thinking of two numbers. If I multiply the first by 4 and the second by 3, the sum of the answers is 109. And if I multiply the first by 3 and the second by 4 and add the results, I get 101.... more
Sum

01/19/15

The sum of two numbers is 89, and their difference is 65. What are the two numbers?

The sum of two numbers is 89, and their difference is 65. What are the two numbers?

10/29/14

Among all the unit vectors find the one for which the sum is minimal

Among all the unit vectors u= <x,y,z> in R3, find the one for which the sum x + 2y + 5z is minimal.    u=<>?
Sum

09/15/14

The sum of five and number added to the product of ten and the number is?

The Sum of five and a number added to the product of ten and the number is what?  
Sum

07/27/14

the sum of two numbers is 72 and one of them is five times the other;what are the two numbers

the sum of three consecutive odd integers is 597.find the integers.
Sum Sigma

03/26/14

Find the indicated sum

Find the indicated sum (∑^20 n=0) 5(5/3)n=

03/23/14

write the sum using sigma notation

Write the sum using sigma notation: 1+2+3+4+......+105= A ∑ n=1 B A= B=  
Sum Sigma

03/21/14

evaluate the sum

(4 sigma k=0) ((-1)k(k+3)2+4)  

01/05/14

Use the sum or difference formulas to determine: A. sin105 degrees and B. tan15 degrees

This is for my trig class, thanks for the help!

01/03/14

Rewrite sin(x+pi)+sin(x-pi) as a product.

This is for my trig class. Thanks for the help!

12/31/13

Use the sum or difference formulas to determine: A. sin105 degrees B. tan15 degrees

This is for my trig class. Thanks for the help!
Sum

11/20/13

Use the sum formula to fill in the blanks in the identity below.

Use the sum formula to fill in the blanks in the identity below. Give exact answers. Do not use decimals. Your answer should be a fraction or an integer.    sin (x+pi/6)= sin (x)=? cos (x)=?
1 3

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