The formula of the altitude of an equilateral triangle with side x:

We have:

Substitute:
Answer: 
Step-by-step explanation:
Given
The cost of paint is 
Nikki need
gallons of paint
So, the cost of the paint is the product of the rate and volume of paint
Put the values

Answer: -2?
im not 100% sure so please b cautious
the product is 9w. Two negatives make a positive
Answer:
26 minutes and 40 seconds
Step-by-step explanation: