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jolli1 [7]
2 years ago
6

N+4-9 - 5n when simplifying

Mathematics
1 answer:
natita [175]2 years ago
7 0

Answer:

-4n - 5

Step-by-step explanation:

4 - 9

= -5

-5n + n

Combine like terms

= -4n

-4n - 5

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The sale price of a router is 35% Off the regular price. The sale price is 117$. What was the regular price ?
sladkih [1.3K]

Okay, the equation would be: What is 35% of $117

Proportion:

\frac{x}{117} \frac{35}{100}

We multiply:

117 x 35 = 4095

Now we divide:

4095 / 100 = 40.95

Then we add:

40.95 + 117 = $157.95

and that's your answer!

I hope this helps! :)

7 0
2 years ago
8% of a number is 20
Gnoma [55]
To find what the number is, we need to set up proportional fractions.
Currently, we have 8% of a number is 20.
To set up our fractions, put 100% under 8% as a fraction first.

It should look like this: 8/100 (hint: per-cent means per-hundred).

Now, we have 20 out of a number, x. This is because we are claiming that 20 is 8% of a number (if we just reword the question without changing the concept).
It should look like this: 20/x.

Our proportional fractions are:
20/x = 8/100.

To solve for this, we need to cross-multiply the denominator of 8/100 (bottom number, 100) with the numerator of 20/x (top number, 20).

This product equation should look like this:
20 x 100 (when simplified, we get 2000).

Now, we need to cross multiply the numerator of 8/100 (top number, 8) with the denominator of 20/x (bottom number, x).

This product equation should look like this:
8x.

Now that we've cross-multiplied, set our two products as an equation.

8x = 2000.

To solve for x, divide both sides by 8 (remember, what you do to one side of an equation, you must do it to the other).

8x / 8 = x
2000 / 8 = 250.

x = 250

Your final answer is:

8% of 250 is 20.

I hope this helps!
3 0
3 years ago
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2 years ago
Find the equation of the tangent at ( 0 , 2) to the circle with equation
erica [24]

Answer:

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2 years ago
What is the property used for 0+91=91
Lisa [10]
<u><em>The additive identity property </em></u>. . . is being used here because no matter what the value is, whenever you add zero (0) to it, you'll always get the value your started with.
6 0
2 years ago
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