MATHEMATICS MIDDLE SCHOOL

24% of what number is 12

Answers

Answer 1
Answer:

24 percent of 50 is equal to 12.

We have,

To find the number when 24% of it is equal to 12, we can set up the following equation:

0.24 * x = 12

Here, x represents the unknownnumber.

To solve for x, we divide both sides of the equation by 0.24:

x = 12 / 0.24

Simplifying the division gives us:

x = 50

Therefore,

24 percent of 50 is equal to 12.

Learn more about expressions here:

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Answer 2
Answer: We set up a proportion: 12/?= 24/100

Cross multiply: 24*?= 12*100
⇒ ?= 12*100/24= 50

The final answer is 50~

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What is 76.78 rounded to the nearest whole number?

Answers

Lets look at the number. 76.78. In each of the different place holders the number is higher than 5. Lets do some examples. 74 rounded to the nearest whole number is going to be 70. 76 rounded to the whole number will be 80. The .78 in your question also contributes. 

Answer: 80
When rounding to the "nearest whole number" you will need to either round up or down.
If its within 1 2 3 or 4 you round down, so if our number was 73, the nearest whole number would be 70.
Our question here consist of 76.78. 
Well just by looking at the first part of the number, 76, we already know that we are rounding up. so in doing this, I was able to get 80 because when 5 6 7 8 or 9 you round up.

What's the value of x and y when 4x+y=210 and 3x+2y=195?

Answers

after substitution method, I got x=45 and y=30
You already hve the answer, but you do this by turning the equation into standard form. Since we are isolating y for each linear equation, we must first subtract the 4x and 3x on both sides. This should come out to y=-4x+219 and 2y=-3x+195. Since we have our first equation in standard form, all we have go do is divide 2 on both sides frome the second equation. Then you can solve by substitution (y=y)

Question 13 of 20 : Select the best answer for the question. 13. Subtract [4 –4 –2] – [4 –3 5].

A. [0 –1 7]

B. [0 –1 3]

C. [0 –1 –7]

D. [0 –7 3]

Answers

The answer is C [0 –1 –7]

How is subtracting like fractions similar to adding like fractions

Answers

Because they both have the same rule. They have to have the same denominator.
Well,

Adding and subtracting like fractions are similar in that both cases simply require you to add the numerators.  This is opposed to adding and subtracting non-like fractions because you have to convert them into like fractions.

The red bus Company Charges 150+72 per hour to rent a bus The blue bus company charges 240+54 per hour for what number of hours with the companies charge for the same

Answers

It will take them 5 Hours to charge the same.The rental charge will be 510.

I did a manual computation per company: My computation is entirely based on trial and error.

Red Bus Co. has a fixed rental rate of 150 and additional rental of 72 per hour while Blue Bus Co. has a fixed rental rate of 240 and additional rental of 54 per hour. Both fixed rental rate are one time charges only and total rental will vary on the number of hours spent in using both vehicles.

Let's start with the Red Bus Co. I will be posting the charges per hour and its running balance. The running balance is the sum.

Fixed Rate      150    Running Balance: 150    => 150 + 0
Hr 1                    72                                      222   => 150 + 72
Hr 2                    72                                      294  =>  222 + 72
Hr 3                    72                                      366  => 294  + 72
Hr 4                    72                                      438  => 366 + 72
Hr 5                    72                                      510  => 438 + 72

I'll do the same process with Blue Bus Co.

Fixed Rate  240      Running Balanc:  240 => 240 + 0
Hr 1                54                                      294 => 240 + 54
Hr 2                54                                       348 => 294 + 54
Hr 3                54                                      402 => 348 + 54
Hr 4                54                                      456 => 402 + 54
Hr 5                54                                      510 => 456 + 54
it's 516 there is your anw

4) Mike bought 2 cups, 1 bowl and 2 plates at a store. The cups cost $2.70 each, the bowl cost$1.75 and the plates were each $2.35. If he paid with a twenty dollar bill, how much
change should he get back?

Answers

answer: $8.15

Step-by-step explanation:

well if Mike bought two cups and each cup cost $2.70 x 2

and since you only bought one bowl it only cost $1.75 and plates were each $2.35 x 2

you will get a total of $11.85

$20 - $11.85 = $8.15
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