Answer:
f(4) = -4
Step-by-step explanation:
f(x) = 4x - 20
Let x= 4
f(4) = 4*4 - 20
Multiply first
= 16 -20
Then subtract
= -4
Factor out 12x^3y^2
12x^3y^2(3y^2+5x^ 2 y z^2 -1)
Answer: 3 mi/h
Step-by-step explanation:
Here we have to find the speed 
at which Sarah walks to school, knowing the distance 
she has walked and the time 
she expends.
So, in this case we can use the following equation:
Where:
Solving:
This is Sarah's speed
1/5 is 2% or 0.2, therefor 2/5 is 4% or 0.4
Answer:
1.To calculate the discount, multiply the rate by the original price.
2.To calculate the sale price, subtract the discount from original price.
Hey mate hope its help you.....✨✨✨✨✨✨
