Question

solve for x: 3x - 7 = 20
13
11
7
9
which trigonometric function is equal to the opposite side divided by the hypotenuse in a right triangle?
secant
tangent
cosine
sine

Explanation:

Step1: Add 7 to both sides

$3x - 7+7=20 + 7$
$3x=27$

Step2: Divide both sides by 3

$\frac{3x}{3}=\frac{27}{3}$
$x = 9$

In a right - triangle, the sine of an angle is defined as the ratio of the length of the side opposite the angle to the length of the hypotenuse.

Answer:

D. 9