Answer:
9
Step-by-step explanation:
a² +b²=c²
a²+40²=41²
a²=41²-40²
a²= 81
a=9
A) 16
y = kx
16 = k*8
16/8 = k
k = 2
y = 2x
32 = 2x
32/2 = x
16 = x
17
1+7p-40=80
-39+7p=80 Move constant to the right
7p=80+39 add the numbers
7p=119 divide both sides by 7
2144.66