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3 years ago

2a+4(7+5a)I need help

Mathematics

2 answers:

kolezko [41]3 years ago

6 0

2a+4(7+5a)

Distribute 4 into 7 and 5a

2a+28+20a

Combine like terms

Final Answer: 22a+28

Gekata [30.6K]3 years ago

3 0

Hello!

First of all, we undo the parentheses using the distributive propoerty.

2a+28+20a

We combine our like terms.

22a+28

I hope this helps!

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An office store pays a whole price of $120 for a laser printer and sells it for $174. What is the pecent mark up

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Answer:

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the equation of a line is y=-1/2x-2. what is the equation of the line that is perpendicular to the first line and passes through

Alexxandr [17]

Perpendicular means that the slopes are negartive inverses, aka
slope1 times slope2=-1

y=mx+b
slope=m

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slope=-1/2

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3 years ago

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weqwewe [10]

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3 years ago

What is 3/4 of 16/21? worked out please

timofeeve [1]

Of means multiplication

So

$\frac{3}{4} \sf{of} \frac{16}{21} = \frac{3}{4} \times \frac{16}{21}$

And then simplify the numerator ad denominator

= $\frac{3 \times 16}{4 \times 21} = \frac{\ 1 \times 16}{4 \times 7}$

And simplify the numerator and denominator again

= $\frac{\ 1 \times 16}{4 \times 7} = \frac{\ 1 \times 4}{1 \times 7}$

And we are finally left with the answer which is $\frac{4}{7}$

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