Sum of x and 7 doubled

Mathematics

1 answer:

Anna71 [15]2 years ago

3 0

Answer:

2(x+7)

Step-by-step explanation:

sum of x and 7 ==> x+7

double the sum ==> 2 * sum

Hence, 2*(x+7)

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Answer:

$\large\boxed{x\approx56.44}$

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Step-by-step explanation:

$\tan12^o\approx0.2126\\\\\tan12^o=\dfrac{12}{x}\to\dfrac{12}{x}=0.2126\qquad\text{convert the decimal to the fraction}\\\\\dfrac{12}{x}=\dfrac{2126}{10000}\qquad\text{cross multiply}\\\\2126x=120000\qquad\text{divide both sides by 2126}\\\\x=\dfrac{120000}{2126}\\\\x\approx56.44$