X 3
-- = --
8 7
Cross Multiply
7x = 24
Divide
x = 3.2485...
A
time taken by a worker= 1/3 hours
time taken by the new worker= 1/5 hours
time taken to complete the work if they work together
= 1/3 + 1/5
= 5+3/15
=8/15
=15/8 hours
Answer:
($20/gal)r + ($30/gal)b ≤ $250
r + b ≤ 10 (gallons)
Step-by-step explanation:
Represent the amount of red paint by r and that of blue point by b.
Olivia must cover 5000 ft^2 with paint, which comes out to 5000/500, or 10, gallons total of red and blue paint. The corresponding inequality is
r + b ≤ 10 (gallons)
She has onlyl $250 to spend. Therefore, the following must hold true:
($20/gal)r + ($30/gal)b ≤ $250
The required sysstem of inequalities is thus
($20/gal)r + ($30/gal)b ≤ $250
r + b ≤ 10 (gallons)
Answer:
(X, y) =(3,-3)
Step-by-step explanation:
Use second equation
Apply to the first
