Answer:
28
Step-by-step explanation:
l = length
w = width
p = perimeter
w = w
l + l + w + w = p (adding all the rectangle's sides together gets us our perimeter)
l = 2w + 4 (four more than twice the width)
Substitute 2w + 4 for 'l' in the original equation
(2w + 4) + (2w + 4) + w + w = 80
Solve equation normally:
6w + 8 = 80
6w = 72
w = 72/6 = 12
(w = 12)
Length = 2w + 4
Substitute 12 for 'w':
2(12) + 4 = l
24 + 4 = l
28 = l
The length is 28
Answer:
h(x)=1/4x
Step-by-step explanation:
Inverse function is when the domain and range of a function are swapped, or in other words the y and x values are swapped.
To do this you simply change x to y, and y to x in the equation
So we have the original equation
y = 4x
swap y and x
x = 4y
now solve for y by dividing by 4
y = x/4
which can also be expressed as h(x)=1/4x
Answer:
The answer is b
Step-by-step explanation:
Answer:
-5/2
Step-by-step explanation:
Slope m = (y2-y1)/(x2-x1)
m = (-2 - 8)/(6 - 2) = -10/4 = -5/2
so y = mx + b
y = -5/2x + b
Using (2,8)
8 = -5/2(2) + b
8 = -5 + b
b = 13
then y = -5/2x + 13
