The cost of company 1: 10x+50
The cost of company 2: 8x+60
The cost will be the same at:

The answer is 5 hours
Step-by-step explanation:
4/5 gallons for 280 ft² (the ² is missing in the question ...).
3 gallons would be 15/5.
so, what do I need to multiply 4 with to get 15 ?
4×x = 15
x = 15/4
multiplying now also 280 ft² with this factor gives us the answer :
280 × 15/4 = 70 × 15 = 1050 ft²
they can paint 1050 ft² with 3 gallons of paint.
Blue paint - 2/1/2 = 1 gallon
White paint - 1/2 gallon
1 wall - 1/4 quart of paint
As 1 quart = 1/4 gallon, one gallon of paint is enough to cover 16 walls.
the walls can be either white or blue and the leftover will be 1 and 1/4 gallon paint.
Answer:
Hope.you have a good merry Christmas Happy early new year