What does the numerator tell us in fraction

Answers

Answer 1
Answer: For an example 3/5 is like i ate 3 of the 5 apples i had
Answer 2
Answer: the numerator tells you how many of the denominators units you have

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Six hundred forty eight thousandths as a decimal number

Answers

thousandths means it has 3 decimal points so it would be 0.648
.00648 would be the correct answer is goes tenths hundredth thousands

A chemist has two acid solutions in stock: one is a 50% solution, and the other is a 80% solution. How much of each solution should be mixed to obtain 100 milliliters of a 68% solution?

Answers

Easy way, visual

                    50---68---80%
Difference        18    12
Invert order to give ratio of 50% and 80%
Ratio                12    18 = 2:3

So by simple proportion:
volume of 50% needed = 100*2/(2+3)=40 mL
volume of 80% needed = 100*3/(2+3)=60 mL

Algebra way
Let x=volume of 50% needed.
Then
0.50*x+0.80*(100-x) = 0.68(100)
Expand and solve for x
0.5x+80-0.8x = 68
0.8x-0.5x = 80-68
0.3x = 12
x=12/0.3 = 40 mL (volume of 50%)
100-x=100-40=60 mL (volume of 80%)

What is 2x2?
Pease help

Answers

Two times two is four (4), if that is what you need. 
You just add that same number to the base when it comes to multiplication. For example, if you had 4x2, then that would be 4 + 4, which is 8. 

Hi there, 2*2 is 4. Multiplication is repeated addition. I hope this helps, have a good day/evening. :)

What is the surface area of a rectangular prism with the length of 13, the height of 5, and the width of 8?A.209

B.836

C.418

D.520

Answers

D (13x5=65, 65x8=520)

I’m really confused

7x - 4 = -2x + 1 + 9x - 5

Answers

7X - 9X + 2X = 1 - 5 + 4

7X - 11X = 1 - 9

- 4X = -8

X = -8 (divided) -4

X = 2
I’m also confused. Idk what you want. But im guessing its solving for x. If so, I will walk you through it.

7x-4=-2x+1+9x-5 first simplify it
7x-4=7x-4

Now you get something to where x has infinite solutions.

Seriously. Try to fill in x with any number and the problem will be correct.

The reason it works is because theres no possible way you can find what x is and the rest of the problem is still equal.

We want to try to get x all on one side but that’s impossible with this equation. So we just say x has infinite solutions.

***the answer is x has infinite solutions***

Brainliest my answer if it helps you out?

Can someone help me please!!!!!1.Grace and Allie are going to meet at the fountain near their houses.They both leave their houses at the same time. Allie passes Grace's house on her way to the fountain.
* Allie's walking rate is 2 meters per second.,* Grace's walking rate is 1.5 meters per second.
 A-How many seconds will it take Allie to reach the fountain.
b-Suppose Grace's house is 90 meters from the fountain. Who will reach the fountain first,Allie or Grace explain why.

Answers

Well, if the fountain is 90 meters from the fountain, to find Allie's distance, simply divide 2 by 90. 
90/2 = 45

It will take Allie about 45 seconds to reach the fountain.

Obviously, Allie will reach the fountain first because she is walking more meters per second.