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4 years ago

Simplify the expression. Explain each step (3y) x 9

Mathematics

1 answer:

arlik [135]4 years ago

3 0

Answer:

27y

Step-by-step explanation:

3×9=27×y = 27y

all is shown

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Step-by-step explanation:

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3 years ago

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3 years ago

Can someone PLEASE help me solve this equation ? due soon

RideAnS [48]

$\sf{Given : 3tanx + 7 = \dfrac{2}{(1 - sinx)(1 + sinx)}}$

We know that : (a - b)(a + b) = a² - b²

$\implies \sf{3tanx + 7 = \dfrac{2}{1 - sin^2x}}$

We know that : 1 - sin²x = cos²x

$\implies \sf{3tanx + 7 = \dfrac{2}{cos^2x}}$

$\sf{\bigstar \ \ We \ know \ that : \boxed{\sf{\dfrac{1}{cos^2x} = sec^2x}}}$

$\implies \sf{3tanx + 7 = 2sec^2x}$

We know that : sec²x = 1 + tan²x

$\implies \sf{3tanx + 7 =2(1 + tan^2x)}$

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3 years ago

Add. Write your answer in simplest form.

alexandr1967 [171]

Answer:

yes, you got it correct

Step-by-step explanation:

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