11z/16+7z/8=5/16
(11z+14z)/16=5/16
25z=5
z=5/25=1/5
3.20 ÷ 2 = 1.6
3.20 + 1.6 = 4.8 (2 for $4.8)
4.8 x 8 = $19.20
The answer should be 8
Answer:
y = -1/2 x - 3.5
Step-by-step explanation:
y = mx+ b
m is the slope of the line
m = -1/2
b is the y-intercept
b = -3.5
Swap x and y, f^-1 is and solve for y to get f^-1 the inverse of f. f(f^-1)=f^-1(f)=x is the identity as a check
f(2)=3*2+1=7 (2,7)
f^-1(7)=2 (7,2)
$12 for 3 pies = $4 for 1 pie
$10 for 2 pies = $5 for 1 pie
store A is the better buy
