For this type of problems, we try to work with the rate of production per unit time.
Let
x=rate of production of old machine (parts/hour)
x+2=rate of production of new machine (parts/hour)
"the new machine finished a certain job in 7 hours while the old one needed 8 hours to produce the same number of engine parts. "
means
7(x+2) = 8x
Solve for x
8x-7x=14
x=14 parts/hour (rate of old machine)
x+2=16 parts/hour (rate of new machine)
Check: 7(14+2)=112, 8(14)=112 ✔
Present Value - <span>the value in the present of a sum of money, in contrast to some future value it will have when it has been invested at compound interest.</span>
Answer:
A=9
Step-by-step explanation:
Answer:
$125 per week
Step-by-step explanation:
Andrew earns $6.25 per hour. If he works for 4 hours, solution will be:
$6.25 × 4 = $25 per day.
If Andrew works 5 days per week, then he earns
$25 × 5 = $125 per week.
Therefore by estimate, Andrew earns $125 per week.
