Me, ! i'm in 9th grade and i still have so much trouble trying to solve these. answer this and show how you did it step by step : ) youi feel like a useless idiot doing these

(-7,5)

Step-by-step explanation:

Dont insult yourself like that. Math is always hard for the first time. Here how i like to solve systems of equations.

Lets start with 2x+y=-9. Lets get y alone so we can input it into the first equation.

2x+y=-9

Subtract 2x from both sides

2x-2x+y=-9-2x

Simplify

y=-2x-9

Now that we have something equal to y, we can input our value of y into 2x+3y=1 to solve for x.

2x+3y=1

input y=-2x-9

2x+3(-2x-9)=1

Multiply the 3 out.

2x-6x-27=1

Combine the x.

-4x-27=1

Add 27 to both sides

-4x-27+27=1+27

Add

-4x=28

Divide both sides by -4

-4x/-4=28/-4

Divide

x= -7

Now that we have a numerical value for x, we can input it into the second equation to find y.

2x+y=-9

Input x=-7

2(-7)+y=-9

Multiply

-14+y=-9

Add 14 to both sides

-14+14+y=-9+14

Add

y=5

Your answer is y=5, x=-7. The form you need it (-7,5).

me

step-by-step explanation:

the answer is b.

step-by-step explanation:

by the trigonometric ratio tangent, tangent equals opposite divided by adjacent.

therefore, tan(50) equals ac/3

multiply each side by 3 to get: ac=3tan(50)

the answer is b.