Let M = Mary's age.
Let J = Jo's age
Let L = Larry's age.
The sum of their ages is 120. Therefore
M + J + L = 120 (1)
Mary's age is three times Jo's age. Therefore
M = 3J (2)
Larry's age is 5 less than Jo's age. Therefore
L = J - 5 (3)
Substitute (2) and (3) into (1).
3J + J + (J-5) = 120
3J + J + J - 5 = 120
5J - 5 = 120
5J = 120 + 5 = 125
J = 125/5 = 25
Therefore
J = 25, M = 3J = 75, L = J - 5 = 20
Answer: Mary's age = 75; Jo's age = 25; Larry's age = 20
If Mary's age is 75, then Jo's age is 25, and Larry's age is 20.
Answer:
<u>The principal of the investment is $ 500</u>
Step-by-step explanation:
1. Let's review the information given to us to answer the question correctly:
Interests = $ 60
Interest rate = 12% annually = 0.12
Time = 1 year
2. Find the principal.
Let's use the formula given:
Interests = Principal * interest rate * time
Replacing with the real values, we have:
60 = Principal * 0.12 * 1
0.12 * Principal = 60
Principal = 60/0.12
Principal = 500
Answer:
perimeter= p1+p2 +p3+p4=add all sides.
area =l×b=
(10m×14m)= 140m
The answer is D. Gym B and Gym A charge the same hourly rate for childcare.
Answer:
Step-by-step explanation: