MATHEMATICS MIDDLE SCHOOL

The difference of twice a number (k) and 8 is 12

Answers

Answer 1

Answer:

Answer: k=2

Step-by-step explanation:

K^2+8=12

K^2=12-8

K=sqrt(4)

Check : 2^2+8=4+8=12

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Se an integer strategy to
2 - (-8)=
= 10

Answers

Answer:

Here's one way to do it

Step-by-step explanation:

You can use a number line for the subtraction of integers.

Subtracting a negative number is the same as adding its opposite; you move to the right on the number line.

The opposite of -8 is +8, so

2 - (-8) is the same as 2 + 8.

Start at 2 and move 8 units to the right.

See the number line below.

2 - (-8) = 10

Which is greater 5 pounds or 81 ounces

Answers

81 ounces is heavier, 5 pounds is 80 ounces.

81 ounces is greater than 5 pounds

A triangle has sides that measure 6m,8m,12m. is it a right triangle?

Answers

Answer:

because it should be 99

after 1 year on the job M got a raise from $10.50 to $11.13 per our. What was the percent increase of her hourly wage

Answers

The answer is 6% increase

Rebecca buys some scarves that cost $5 each and 2 purses that cost $12 each. The cost of Rebecca's total purchase is $39. what equation can be used to find n, the number of scarves that Rebecca buys?

Answers

Let n represent the amount of scarves Rebecca buys, and p represent the number of purses Rebecca buys.

We know that scarves cost $5 each, and purses that cost $12 each. We also know that the cost of Rebecca's entire purchase is 39 dollars.

So,

5n + 2p = $39

However, we were also given that Rebecca buys a total of 2 purses, so we can plug that into the equation.

5n + 2(12) = 39

When simplified, we get:

5n +24 = 39

To simplify even further, we must subtract 24 from both sides of the equation.

5n = 15

Finally, we must divide both sides by the coefficient of the variable, or 5.

n = 3

Therefore, Rebecca buys 3 scarves.

However, this problem didn't ask you to solve the equation, therefore the correct answer in this situation is probably one of the ones we started out with, either

5n + 2(12) = 39

or

5n +24 = 39

A shelter has enough food to feed an average of 80 hungry people a day for 14 days. If an average of 32 people are at the shelter each day, how long will the food last?

Answers

Answer:

35 days.

Explanation

The capacity of the shelter is a constant. It is 80 people × 14 days.

That is an inverse relation: the product of the number of people and the number of days will be always the same.

As the number of people decreases the number of days that the food lasts increases, in a proportion such that the product of the days and the number of people is the same.

Thus, for 32 people the number of days the food lasts is x, such that: