2 years ago

There are some books on a shelf and 12 are cookbooks. If 20% are cookbooks, how many books are on the shelf

1 answer:

5 0

If u take 12 divided by .20 you would get 60 because if u think of it as a dinner bill say it is $60.00 and I want to give a 10% tip it would be $6 but if u give a 20% tip u would give $12

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Lana71 [14]

Answer:

cosine = adjacent/hypotenuse

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Step-by-step explanation:

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3 years ago

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If parallelogram ABCD was reflected over the y-axis, reflected over the x-axis, and rotated 180°, where would point A' lie?

LuckyWell [14K]

D (-4 , -1)
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3 years ago

Find the difference (5a^2+4ab-3b^2)-(-5ab+4b^2+3a^2)

Vesna [10]

Answer:

$\boxed{\bold{2a^2+9ab-7b^2}}$

Step By Step Explanation:

Remove Parenthesis: (a) = a

$\bold{5a^2+4ab-3b^2-\left(-5ab+4b^2+3a^2\right)}$

Simplify $\bold{-\left(-5ab+4b^2+3a^2\right)}$

$\bold{5ab-4b^2-3a^2}$

Rewrite Equation:

$\bold{5a^2+4ab-3b^2+5ab-4b^2-3a^2}$

Simplify $\bold{5a^2+4ab-3b^2+5ab-4b^2-3a^2}$

$\bold{2a^2+9ab-7b^2}$

- Mordancy

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3 years ago

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Find the slope of each line

Klio2033 [76]

Answer:

Positive, Negative, undefined, positive

Step-by-step explanation:

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2 years ago

If you can help with the explanation I will mark brainpower

Oksanka [162]

Answer:

It is 90º

Step-by-step explanation:

Looking at the picture, we realize that the angle direcly beside it, EGD, is 90º. Now, both angles form a straight line, which equals 180º. 180-90= 90º.

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