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3 years ago

75% of this number is 13.5

Mathematics

2 answers:

vaieri [72.5K]3 years ago

7 0

Let y represent the number.

13.5 = 0.75y
(Divide both sides by 0.75)
y = 18

Therefore the number is 18.

cluponka [151]3 years ago

5 0

Answer:

10.125

Step-by-step explanation:

Hello!

To find this we first have to convert the percentage to a decimal

We do this by moving the decimal point two times left

75.0% = 0.75

Now we multiply this by the number

13.5 * 0.75 = 10.125

The answer is 10.125

Hope this helps!

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Seven ninths minus one third

erica [24]

An easy way to do questions like these is by converting the fractions into decimals, at least I used to find it easier by doing so when I first encountered them.
So,
7/9 as a decimal is 0.77
1/3 as a decimal is 0.33

You can do;

0.77 - 0.33

You are left with;

0.44

Which in it's simplest fraction form is;

11/25.

Your answer is 11/25.

I hope this helped, if you need help with understanding how to conver then do let me know! ;3

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3 years ago

Simplify <br> 7x + 8 = 36

Komok [63]

To simplify that equation you would first subtract 8 from both sides, getting 7x=28. You would then divide both sides by 7, getting x=4.

4 0

3 years ago

Read 2 more answers

What is the solution to the system of equations? ⎧⎩⎨⎪⎪x+3y−z=24x+2y+5z=13x+z=12 (−4, 1, −3) (3, 0, 3) (5, −2, −3) (−1, 2, 3)

snow_tiger [21]

<h3>Answer:</h3>

(5, -2, -3)

<h3>Explanation:</h3>

We assume your equations are ...

x +3y -z = 2
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3x +0y +z = 12

These have solution (x, y, z) = (5, -2, -3).

_____

Trying the choices in the last equation eliminates the first and last. Trying the second choice in the first equation eliminates it, leaving the 3rd choice as the answer you're looking for.

We also know because we can ask a graphing calculator to solve the matrix equation (or row-reduce the augmented matrix).

<em>Comment on this problem</em>

The hardest part of this problem is figuring your intent. The equations are not well-separated, so we have a hard time telling what is a constant and what is a coefficient. It took a couple of guesses to sort it out. A little editing before posting would be helpful.

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Dima020 [189]

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4 years ago

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At the school carnival, Jade has a game booth with a spinner. The banner at her booth reads "80% chance of winning!" What is the

Vesnalui [34]

Hi there!

»»————-　★　————-««

I believe your answer is:

20%

»»————-　★　————-««

Here’s why:

⸻⸻⸻⸻

The banner reads that there is an 80% chance of winning a prize.

⸻⸻⸻⸻

$100\% - 80\% = \boxed{20\%}$

⸻⸻⸻⸻

There is a 20% chance that the player would not win.

»»————-　★　————-««

Hope this helps you. I apologize if it’s incorrect.

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