The best and most correct answer among the choices provided by the question is the first choice. The first step to do during the substitution method is to solve the top equation for x. I hope my answer has come to your help. God bless and have a nice day ahead!

5 0

3 years ago

Here's another Math one worth 10.

tia_tia [17]

In a 30-60-90 triangle the side opposite the 30 degree angle is half the length of the hypotenuse.
The short leg is the side opposite the 30 degree angle. If the short leg =x, then the hypotenuse = 2x

The ratio of the short leg to the hypotenuse in the given triangle is cos(60°)

$
cos(60^o) = \frac{adjacent \ side}{hypotenuse } = \frac{x}{2x} = \frac{1}{2}$

Answer is C. 1:2

7 0

3 years ago

What are the solutions of the equation? x2- 16/25=0

OverLord2011 [107]

x² - 16/25 = 0

x² = 16/25

x = ±√(16/25) = ±4/5

Answer: x=4/5 and x=-4/5

4 0

4 years ago