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Aloiza [94]
3 years ago
12

Jack is 4 times as old as Lacy. 3 years from now the sum of their ages will be 71 . How old are they now?

Mathematics
1 answer:
Marizza181 [45]3 years ago
3 0

Answer:

Lacy is 13 and Jack is 52

Step-by-step explanation:

In 3 years their ages will add up to 71 so you have to subtract 6 as there are two of them to get 65. Lacy's age is represented by x and since Jack is 4 times older his age is represented by 4x. So added together their age is 5x. So 5x=65. Then 65/5=13. So 13=x. So Lacy is 13 and Jack is 52 as 13x4 is 52.

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If jobs arrive every 15 seconds on average, what is the probability of waiting more than 30 seconds?
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Answer: 0.14

Step-by-step explanation:

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