Andrew pays a monthly membership fee of $10 at his gym. Each time he uses the gym, he pays $5. Last month, Andrew

Mathematics

2 answers:

slamgirl [31]3 years ago

6 0

Answer:

Step-by-step explanation:

11x5+10=65

Musya8 [376]3 years ago

5 0

Answer:

Step-by-step explanation:

10+5x=85

minus 10 from both sides to get 5x=75

divide each side by 5 to get $\frac{5x}{5} = \frac{75}{5}$

the two fives should cancel each other out on the left side. simplify 75/5 to get 15.

x= 15

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Liula [17]

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$\boxed{\boxed{x=\dfrac{\pi}{3}\ \vee\ x=\pi\ \vee\ x=\dfrac{5\pi}{3}}}$

Step-by-step explanation:

$\cos(3x)=-1\iff3x=\pi+2k\pi\qquad k\in\mathbb{Z}\\\\\text{divide both sides by 3}\\\\x=\dfrac{\pi}{3}+\dfrac{2k\pi}{3}\\\\x\in[0,\ 2\pi)$

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