I need help on this question

it's answer is 65 cm.

Step-by-step explanation:

We know that the largest side is hypotenuse so here

hypotenuse (h) = 97 cm

we can consider 72 cm as base or perpendicular. So I let it as perpendicular (p) = 72 cm

Base (b) = ?

We know by using Pythagoras theorem

b² = h² - p²

b² = 97² - 72²

b² = 9409 - 5184

b² = 4225

b = √4225

b = 65

Therefore the third side is 65 cm long.

y = 5x + 17

step-by-step explanation:

a perpendicular line will be the opposite reciprocal slope of the given equation.   the slope given is -1/5 so the opposite reciprocal is 5

find b:

7 = 5 (-2) + b

7 = -10 + b

17 = b

write equation

y = 5x + 17