2 years ago

Find the average of -4, -8, -12, 0, and -6.

1 answer:

nataly862011 [7]2 years ago

6 0

Answer:
-6

To find the average, you first have to add each of your numbers.

(-4)+(-8)+(-12)+(0)+(-6)

-30

Next, you have to divide it by the number of terms

-30/5

Your answer is -6

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Natalie went to the shoe store and bought two pairs of sneakers. One pair was $35.60, and the other was $49.95. If she has $100.

Contact [7]

First you need to add the prices to get 85.55. Then 100 - 85.55 is 14.45.

She will have $14.45 leftover

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3 years ago

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GIVING 20 POINTS<br> If a=4 b=8 c=2 d=7 e=3 f=9 g=10<br> What does bc-c³ equal?

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Answer:

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b=8

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3 years ago

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a parking meter accepts only 20p coins or 50p coins.On one day, 39 coins were collected with a total value of $11.40. find how m

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Answer:

x + Y = 39 or x = 39-y

20x + 50y = 1.40

20 (39 - y) + 50y = 11.40

7.80 - 20y + 50y = 11.40

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y = 3.60/30

y = 12 50p coins were collected.

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Proof:

20*27 + 50*12 = 11.40

5.40 + 6 = 11.40

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I hope it helps.

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2 years ago

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What is the common denominator of (5/x^2-4) - (2/x+2) in the complex fraction (2/x-2) - (3/x^2-4)/(5/x^2-4) - (2/x+2)

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9514 1404 393

Answer:

common denominator: (x² -4)
simplified complex fraction: (2x +1)/(9 -2x)

Step-by-step explanation:

It is helpful to remember the factoring of the difference of squares:

a² -b² = (a -b)(a +b)

Your denominator of (x² -4) factors as (x -2)(x +2). You will note that one of these factors is the same as the denominator in the other fraction.

It looks like you want to simplify ...

$\dfrac{\left(\dfrac{2}{x-2}-\dfrac{3}{x^2-4}\right)}{\left(\dfrac{5}{x^2-4}-\dfrac{2}{x+2}\right)}=\dfrac{\left(\dfrac{2(x+2)}{(x-2)(x+2)}-\dfrac{3}{(x-2)(x+2)}\right)}{\left(\dfrac{5}{(x-2)(x+2)}-\dfrac{2(x-2)}{(x-2)(x+2)}\right)}\\\\=\dfrac{2(x+2)-3}{5-2(x-2)}=\boxed{\dfrac{2x+1}{9-2x}}$

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