The correct answer is c (2x+10)
I think her error was that she multiplied he numbers wrong
1/3 - 2/9 - 1/3
= -2/9
(Decimal: -0.222222)
Answer:
cos R = .38
Step-by-step explanation:
First you need to find the length of the hypotenuse.
Use a squared + b squared = c squared
100 + 576 = c squared
square root of 676 is 26
CosR is adjacent over hypotenuse.
Adjacent is 10
Hypotenuse is 26
10/26 = .38
I would say that its pair 1 and 3
