jahnasiahill5349
11.05.2021 •
Mathematics
When benny's sister is 24, Benny's age will be 125% of her age. How old will Benny be then, and is Benny is 12 years old now, how old is penny now?
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Ответ:
A. 30
B. 6
Step-by-step explanation:
We'll use P for Penny's age and B for Benny's age. When Penny is 24, Benny will be 1.25 her age. Thus:
B = 1.25 * 24
(benny is 25% older than her)
So Benny's age then will be 1.25 * 24 = 30.
When Benny is 30, Penny will be 24. This means that he is older than her by 6 years. Think about it for a second: Benny will always be 6 years older than her. You can write that as:
B = P + 6
If Benny is 12 years old now,
12 = P + 6
Subtract 6 from both sides and you get
6 = P
or P = 6
Penny is 6 years old when Benny is 12.
Ответ:
$6.995
Step-by-step explanation:
Based on the information provided in the question, the amount of money that Carlos use to pay for the items will be:
= (2 × $2.99) + (1/2 × $0.79) + $0.62
= $5.98 + $0.395 + $0.62
= $6.995
Based on the calculation above, Carlos paid for the items with $6.995