Answer:
25 hrs
Step-by-step explanation:
#First, we calculate the average earnings per hour by subtracting the running costs from receipts:
Let x be the number of hours it takes to fully recover the investment costs. We divide the investment cost by net receipts to solve for x;
Hence, it takes 25 hrs to repay the investment cost.
Answer:
y=-5x+2
Step-by-step explanation:
Answer:
Step-by-step explanation:
Let Justin's age be x
Arlene today is 1/4 x
Ten years from now
Arlene: 1/2 (x + 10) = 1/4 x + 10 Remove the brackets
1/2 x + 5 = 1/4x + 10 Subtract 1/4x from both sides.
1/2 x - 1/4x + 5 = 10 Combine
1/4x + 5 = 10 Subtract 5 from both side
1/4 x = 10 - 5 Combine
1/4 x = 5 Multiply both sides by 4
x = 5 * 4
x = 20
Arlene is 5 years old (1/4 20) right now
Answer: Last year, Arlene was 4 years old