Answer:
y = 36x
Step-by-step explanation:
Given that x and y vary directly then the equation relating the is
y = kx ← k is the constant of variation
To find k use the condition x =
, y = 12, then
k =
=
= 12 × 3 = 36
y = 36x ← equation of variation
Answer:
-2
you take two away every time
Answer:
110 chocolate cupcakes
88 vanilla cupcakes
Step-by-step explanation:
5chocolate to 4 vanilla
5x+ 4x = 9x
9x=198,
x = 22
22 * 5=110 chocolate cupcakes
22 * 4=88 vanilla cupcakes
CHECK: 88 + 110 = 198
Answer:
The maximum width of the pool must be 38 ft
Step-by-step explanation:
Let
y -----> the length of the swimming pool
x ----> the width of the swimming pool
The perimeter of the swimming pool is

we have

substitute


Remember that
The perimeter of the pool must be no more than 120 feet
so
The inequality that represent this scenario is

Solve for x



therefore
The maximum width of the pool must be 38 ft