All categories

3 years ago

7 is a prime number. No multiple of 7, except 7 itself, can be a prime number. Explain why not.

Mathematics

1 answer:

Harrizon [31]3 years ago

6 0

Answer: Answer is in the steps.

Step-by-step explanation:

No multiple of 7 can be a prime number because then it will have more than two factors.7 is a prime number because it has only two factors 1 and itself. For example, 14 is a multiple of 7 because 7 times 2 is 14. But now it 14 itself will not be a prime number because it has more than two factors which is 1,2,7 and 14.

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6x – 4y = -5<br>4x + 5y = -11

kipiarov [429]

Answer:

x= -1.5, y= -1

Step-by-step explanation:

6x= -5+4y

x= (-5+4y) / 6

4((-5+4y) / 6) + 5y = -11

4(-5+4y) + 5*6y = -11*6

-20+16y+30y= -66

16y + 30y = -66+20 = -46

y(16 + 30) = -46

y= -46 / (16 + 30)

y= -46 / 46

y= -1

x= (-5+4(-1)) / 6

x= (-5-4) / 6

x= -9 /6

x= -1.5

3 0

4 years ago

Suppose restaurant A's chicken salad contains 6more grams of fat than restaurant B's chicken salad. Find the number of grams o

LenKa [72]

Answer:

Restaurant A: 31 grams of fat

Restaurant B: 25 grams of fat

Step-by-step explanation:

$x + (x + 6) = 56\\2x + 6 = 56\\2x = 50\\x = 25$

4 0

3 years ago

A company is offering to pay a stadium $750,000 per year for naming rights. If the administrative costs for this sponsorship are

juin [17]

Answer: The costs are 8.4% of the total revenue.

The stadium is going to make $750,000 for the naming rights of the stadium. The cost to the stadium is on $63,000.

To find the percent, we have to divide the two values and multiply by 100.

63000 / 750000 x 100 = 8.4%

7 0

3 years ago

Safiya deposited money into a bank account that earned 6.5% simple interest each year. After 3 1/2 years, she had earned $36.40

N76 [4]

Answer:

$1,792

Step-by-step explanation:

3 1/2×36.40=116.48

116.48÷6.5%=1,792

$1,792

5 0

3 years ago