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Tju [1.3M]
3 years ago
5

Currently, Lupe and Hector are 61 and 67 years old, respectively. They have two daughters and a grandson, who are 37, 31 and 7 y

ears old, respectively. Lupe noted that their current ages are all prime numbers. During how many of the next 25 years will it also be true that their ages are all prime numbers?
Mathematics
1 answer:
RSB [31]3 years ago
3 0

Answer:

2 years

Step-by-step explanation:

We can check all the possibilities. Necessarily, Hector's age in years must be prime, then we consider the years when this happens and test for the other members of the family.

Hector is 67 years old, so in 25 years he will be 92 years old. The prime numbers between 67 and 92 are 71, 73, 79, 83 and 89.

When Hector is 71 years old, four years have passed the Lupe is 65 years old, so this case fails.

When Hector is 73 years old, six years have passed. Lupe is 67 years old, an their daughters and grandson are 43, 37 and 13 years old. All of these are prime numbers, therefore in this year the statement holds.

When Hector is 79, twelve years have passed. Then, the eldest daughter is 49, which is not a prime number thus this case fails.

When Hector is 83, sixteen years have passed, so Lupe is 77 which is not prime. This case fails too.

Finally, when Hector is 89, 22 years have passed. Lupe is 83, the daughters are 59 and 53 resp; the grandson is 29. All of these are primes, so the statement is true.

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$27.2

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680x0.04=. 27.2

She made $27.2 last week

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A bank lent $200,500 for the development of two products. If the loan for priduct X was for $50,500 more than that for product Y
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Answer:

$75,000

Step-by-step explanation:

Let

x ----> amount lent for product X

y ---->amount lent for product Y

we know that

A bank lent $200,500 for the development of two products

so

x+y=200,500 ----> equation A

The loan for product X was for $50,500 more than that for product Y

so

x=y+50,500 ----> equation B

substitute equation B in equation A

y+50,500+y=200,500

solve for y

2y=200,500-50,500\\2y=150,000\\y=\$75,000

8 0
3 years ago
Mr. Jones has all the students in his class line up. The 9th student in line ends up being exactly at the middle of the line. Ho
kifflom [539]
The 9th student is in the middle.
⇒ There are 8 students before him
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Answer: 17
6 0
3 years ago
In Las Vegas, Nevada, stores charge a 4.6% state sales tax and a 3.65% county sales tax. Keven is buying a handbag priced at 220
marshall27 [118]

Keven paid a sales tax of $ 18.15 for handbag purchase

<em><u>Solution:</u></em>

Given that stores charge a 4.6% state sales tax and a 3.65% county sales tax

Keven is buying a handbag priced at 220 before tax

To find: Sales tax paid by Keven

Sales tax amount = state sales tax amount + country sales tax amount

<em><u>Finding state sales tax amount:</u></em>

stores charge a 4.6% state sales tax which means 4.6 % of $ 220

state sales tax amount = 4.6 % of 220

\text{ state sales tax amount }= \frac{4.6}{100} \times 220

\text{ state sales tax amount }= 0.046 \times 220 = 10.12

Thus state sales tax amount is $ 10.12

<em><u>Finding country sales tax amount:</u></em>

Store charges a 3.65% of country sales tax which means 3.65% of $ 220

Country sales tax = 3.65 % of 220

\text{ Country sales tax } = \frac{3.65}{100} \times 220\\\\\text{ Country sales tax } = 0.0365 \times 220 = 8.03

Thus country sales tax = $ 8.03

<em><u>Now let us add both amount to get total tax paid by Keven</u></em>

Sales tax amount = state sales tax amount + country sales tax amount

Sales tax amount = $ 10.12 + $ 8.03 = $ 18.15

Therefore Keven paid a sales tax of $ 18.15 for handbag purchase

4 0
3 years ago
One side of a square is represented by 5y.Which polynomial expression BEST represents the area of the square?
VMariaS [17]

Answer:

25y^2

Step-by-step explanation:

The area of a square is A=s*s where s is the side length. Here s=5y. So the area is A = s*s = 5y*5y = 25y^2

3 0
3 years ago
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