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3 years ago

How do you write a ratio as a percent

Mathematics

1 answer:

Vikentia [17]3 years ago

3 0

Take the ratio
4:8
Convert it to a fraction
4/8
Divide
.5
Multiply by 100 and add a % sign
50%

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Lee Middle School orders 15 textbooks for every 12 students. The table shows how many textbooks the school orders for certain nu

Mariulka [41]

Answer: 90 textbooks

Step-by-step explanation:

everytime you multiply the number of students you multiply the books by the same number. to find how many times 72 was multiplied you divide it by 12.

72 ÷ 12 = 6

then multiply the original number of books (15) by 6.

15 * 6 = 90

so for every 72 students the school orders 90 textbooks

5 0

3 years ago

What is the question of the line that passes through the point (-2,-2) and has a slope of 4. Plz someone answer

Studentka2010 [4]

Answer:y=4x+6

Step-by-step explanation:

We have the information that the slope is 4 and the line goes through the point (-2,-2). With this information, we can make a linear equation in a point slope form ( $y - y_{1}= m * (x - x_{1})$ , so the equation would be $y+2=4(x+2)$ , or simplified, $y+2=4x+8.$ in order to solve for y (to make it a slope-intercept equation), we must subtract 2 from both sides. This gives us the equation y=4x+6. Hope this helps!

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3 years ago

____ + g - g = k * g k -g -k

natta225 [31]

Ummmmmmm yeah..what is this

8 0

3 years ago

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Find the perimeter of a rectangle that has a length of 2x +7 and a width of 5x.

Harlamova29_29 [7]

Answer:

14x + 14

Step-by-step explanation:

Perimeter = 2( L + W)

2(2x+7 + 5x) = 2(7x + 7)

distributive property

= 14x + 14

3 0

3 years ago

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Help with num 9 please. thanks

Alik [6]

Answer:

See Below.

Step-by-step explanation:

We want to show that the function:

$f(x) = e^x - e^{-x}$

Increases for all values of x.

A function is increasing whenever its derivative is positive.

So, find the derivative of our function:

$\displaystyle f'(x) = \frac{d}{dx}\left[e^x - e^{-x}\right]$

Differentiate:

$\displaystyle f'(x) = e^x - (-e^{-x})$

Simplify:

$f'(x) = e^x+e^{-x}$

Since eˣ is always greater than zero and e⁻ˣ is also always greater than zero, f'(x) is always positive. Hence, the original function increases for all values of x.

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3 years ago