MATHEMATICS MIDDLE SCHOOL

1.) If 60% of a number is 18, what is 90%of the number? A.)3
B.)16
C.)27
D.)30
2. Taryn's grandma took her family out to dinner.If the dinner was $74 and Taryan's dinner was 20% of the bill, how much was Taryn's dinner?
A.$6.80
B.$7.20
C.$9.50
D.$14.80

Answers

Answer 1
Answer: 1. You know that to get the percentage of a number you multiply the number by the percent and divide it by 100. But they are asking you to find the number so you are going to do the opposite: 18 times 100 divided by 60 and you are going to get the number 30 (that's the original number, if you want to check it get 30 multiply it by 60 and divide it by 100 and you are going to get18). Now they are asking you for 90% of the original number so you do 90 times 30 divided by 100 and you get 27 (final answer)

Hope it helps!!
Answer 2
Answer: #1) is letter C.
#2) is letter D.

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At the car wash fundraiser jenna's team washed 14 cars in 45 minutes. if they keep up at that rate, how many cars can the team wash in 2.5 hours? how did you get the answer

Answers

i think the answer would be about 25 but i´m not real sure.

Mr. Alexander had a negative bank account balance of -$50. He went out to dinner, and spent $23.73. The balance in Mr. Alexander's bank account is now:

Answers

Answer:

-$73.73

Step-by-step explanation:

To get this answer, we must subtract 23.73 from -50, as Mr. Alexander is losing money by spending. Once we subtract, we get -73.73 dollars.

Hope this helps!

Answer:

-$73.73

Step-by-step explanation:

His bank account had a balance of -50

Now, after he spent 23.73, he has -$50 - $23.73.

-$50 - $23.73 = -$73.73

The balance in Mr. Alexander's bank account is now: -$73.73

Hope this helps :)

Have an awesome day!

Please help I been stuck on this for ever

Answers


From the picture, you can see that in order to go all the way around,
she'll need  4-2/3 yards  twice, and  6-3/4 yards  twice. 

That's called the 'perimeter' of the rectangle.  It's always (2 lengths) + (2 widths).

I just gave you the addition problem.  Add up the mixed numbers, and see
whether the perimeter is more or less than  22 .
If I were to solve this, I would take the 4 2/3 times itself and 6 2/3 times itself. When you get the mixed numbers, add them together and see if the number is less than 22 yards. If it is, you have the right answer.

How many solutions does the equation have?4(2x + 3)= 2(3x-4)

A. one solution
B. Infinite solutions
C. no solution

Answers

4(2x + 3)= 2(3x-4) \n \n 2(2x + 3) = 3x - 4 \ / \ divide\ each \ side \ by \ 2 \n \n 4x + 6 = 3x - 4 \ / \ expand \ equation \n \n 4x + 6 - 3x = -4 \ / \ subtract \ 3x \ from \ each \ side \n \n x + 6 = -4 \ / \ simplify \n \n x = -4 - 6 \ / \ subtract \ 6 \ from \ each \ side \n \n x = -10 \ / \ simplify \n \n Answer: \fbox {A) One solution / x = -10}
4(2x + 3) = 2(3x - 4)

Keep in mind the distributive property:
a(b + c) = ab + ac
a(b - c) = ab - ac

So, apply the distributive property to get:

4(2x) + 4(3) = 2(3x) - 2(4)

Simplifying that more, we get:

8x + 12 = 6x - 8

Subtract 6x on both sides

8x + 12 - 6x = 6x - 8 - 6x
8x - 6x + 12 = -8
2x + 12 = -8

Subtract 12 on both sides

2x + 12 - 12 = -8 - 12
2x = -8 - 12
2x = -20

Divide by 2 on both sides

2x/2 = -20/2
x = -20/2
x = -10

There is only one solution, so your answer is A. one solution.

I am a number between 60 and a 100 my ones digit is this then my tens digit I am a prime number the some of my digit is 8 what number am I

Answers

So a prime number and it's prime so

8_...

between 80 and 89

8_...

between 80 and 89

the second angle in a triangle is five times as large as the first. The third angle is 2/3 as large as the first. What are the angle measures?

Answers

Hello,
let x the first angle

5x the second
2/3 x the third

x+5x+2/3x=180
==>20x/3=180
==>x=27 (°)
5x=5*27=135
2/3*x=2/3*27=18

27+135+18=180
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