PLZ
Can someone help my Brian is fried. Plz show how u got the answer

What is the perimeter of this triangle?

90

Step-by-step explanation:

Using the Pythagorean Theorem, with the missing side being x, 9²+x²=40², and x=√(40²+9²)=41. Adding the 3 sides up, we get 90

3.4 pizzas

step-by-step explanation:

given is a scatter plot showing number of pizzas sold during weeks for different issues of coupon

y represents number of pizzas sold and x number of coupons issued

y is marked verticaly and x horizontally

the trend line is given as

y =3.4x+43

this says that even when no coupon is issued pizzas sold will be 43

and rate of change of pizza sold for 1 unit of coupon = slope = 3.4

i.e. when x increases by 1 unit y increases by 3.4 units

hence for each additional coupon issued 3.4 pizzas more will be sold