2 years ago

Last one!! Help for brainliest!!

Mathematics

1 answer:

bixtya [17]2 years ago

4 0

Answer:

$12x^{2}+18x-7$

Step-by-step explanation:

$f(g(x))=3(2x)^{2}+9(2x)-7$

$3(4x^{2})+18x-7$

$12x^{2}+18x-7$

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Step-by-step explanation:

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2 years ago

Scateboard cost Rs450each in my local store,The shop keeper says if I buy 1 I can buyanother for only 7/9 of the normal price,ho

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Answer:

the cost will be Rs 350

Step-by-step explanation:

The Scateboard cost Rs 450 each in the local store,The shop keeper says if I buy 1 I can buy another for only $\frac{7}{9}$ of the normal price. We are asked to determine the cost of a second scateboard .

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3 years ago

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ser-zykov [4K]

Answer:

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Step-by-step explanation:

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2 years ago

Read 2 more answers

If ∠C and ∠D are vertical angles and m ∠ C = x + 5 and m ∠ D = –2x + 80, what is m ∠ C?

amm1812

Answer:

m∠C=30°

Step-by-step explanation:

we know that

<u>Vertical Angles</u> are the angles opposite each other when two lines cross. They are always equal

m∠C=m∠D

substitute the given values

$(x+5)\°=(-2x+80)\°$

Solve for x

$x+2x=80-5\\3x=75\\x=25$

<em>Find the measure of angle C</em>

m∠C=(x+5)°

substitute the value of x

m∠C=(25+5)=30°

3 0

2 years ago