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MAVERICK [17]
3 years ago
9

What is 25% out of 120

Mathematics
2 answers:
erastova [34]3 years ago
6 0
I think the answer is 30
Rina8888 [55]3 years ago
5 0

I assume, that the number 120 is 100% - because it's the output value of the task.

If 120 is 100%, so we can write it down as 120=100%.

We know, that x is 25% of the output value, so we can write it down as x=25%.

<em>Now we have two equations:</em>

<em>1) 120=100% </em>

<em>2) x=25%</em>

where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

<em>120/x=100%/25%</em>

<em>Solution for what is 25% of 120:</em>

<em>120/x=100/25 </em>

<em>(120/x)*x=(100/25)*x   - we multiply both sides of the equation by x </em>

<em>120=4*x   - we divide both sides of the equation by (4) to get x </em>

<em>120/4=x  </em>

<em>30=x  </em>

<em>x=30</em>

<em>The answer is: 25% of 120=30</em>

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Add all is 45 and then you subtracted 30 it’s 15
5 0
3 years ago
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Matrix a is a 6 × 5 matrix. which order of matrix can be multiplied by matrix a to create matrix ab?
mezya [45]

Order (B) 5 × 6 of the matrix can be multiplied by matrix a to create matrix ab.

<h3>What is a matrix?</h3>
  • A matrix is a rectangular array or table of numbers, symbols, or expressions that are organized in rows and columns to represent a mathematical object or an attribute of such an object in mathematics.
  • For instance, consider a matrix with two rows and three columns.

To find the order of matrix:

  • We must first check the dimension of two matrices, say matrix A by matrix B, before we may multiply them.
  • Multiplication is achievable if the number of columns in the first matrix, A, equals the number of rows in the second matrix.
  • Dimension is assigned to the provided matrix: 6 × 5
  • This means the given matrix contains six rows and five columns.
  • As a result, the second matrix MUST have 5 rows in order for multiplication to be POSSIBLE.
  • The only matrix with 5 rows among the above alternatives is the matrix with dimension (B) 5 × 6.

To prove:

  • In other words, the inner products of the dimensions should be equal.
  • That is; (a × b)(b × a) is possible but (a ×b)(c × b) is impossible.
  • The dimensions of the matrix are given by, row × column.

Therefore, order (B) 5 × 6 of the matrix can be multiplied by matrix a to create matrix ab.

Know more about matrix here:

brainly.com/question/24079385

#SPJ4

7 0
2 years ago
How much water should I drink if I weight 236
Vitek1552 [10]

Answer:

3Letri per day

Step-by-step explanation:

can make you lose weight

5 0
3 years ago
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Write the equation of the line that is perpendicular to the line 8y−16=5x through the point (5,-5).
disa [49]

Answer:

y = -(8/5)x + 3

Step-by-step explanation:

Step 1:  Rewrite the given equation into slope-intercept form by solving for y

8y−16=5x

 

   8y = 5x + 16

 

      y = (5/8)x + 2

Perpendicular lines have slopes that are opposite reciprocals of each other.  That means you take the slope, flip the fraction, and change the sign.

Here our given line is y = (5/8)x + 2 so the slope 5/8

The opposite reciprocal of 5/8 is -8/5

We set up the equation

y = -(8/5)x + b      

  we are given a point (x, y) of (5, -5), so plug that in and solve for b

-5 = -(8/5)(5) + b

    -5 = -8 + b

     3 = b  

So our equations is  y = -(8/5)x + 3

4 0
3 years ago
The ratio of Sarah's age to Keisha's age is 4:5 this year. Keisha was 12 years old 3 years ago. Find the ratio of Sarah's age to
KiRa [710]
First, we need to find her current age. If she was 12 years old 3 years ago, her current age is 12 + 3 which is 15. If the ratio of Sarah's age to Keisha's age is 4:5 (Sarah's age is the 4 and Keisha's age is the 5).
If we take 15 and divide that by 5 (her ratio), then you get 3. Now multiply 3 by 4 to find Sarah's age. We get 12. Nine years from now, her age is 12 + 9 which is 21.

There is the answer. Sarah's age in 9 years is 21 years old. I hope this helps.
5 0
3 years ago
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