I need help please and thank you

c = 13

Step-by-step explanation:

2 ways of going about in this problem

1. If you have done enough Pythagorean theorem problems, you might be able to memorize some common right triangle side lengths, such as 3-4-5 or

5-12-13

2. actually using Pythagorean theorem

, where c is hypotenuse

c =

c = = 13

lockers 1, 4, 9, 16, 25, 40, and 49 are open

i ran through it by the other answer is wrong

a) y = -3x +2

b) y = 1/2x -6

these 2 can be combined into one equation.

-3x +2 = .5x -6

8 = 3.5x

x = 8 / 3.5 = 2.2857142857

y = -3 * (8 / 3.5) +2

y = (-24 / 3.5) + 2

y = -4.8571428571

step-by-step explanation: