Answer:
y = -5
Step-by-step explanation:
-3x +9y = -57
Let x = 4
-3*4 +9y = -57
-12 +9y = -57
Add 12 to each side
-12+12 +9y = -57+12
9y = -45
Divide each side by 9
9y/9 = -45/9
y = -5
I believe the answer is F(x)= -4x so the last option.
Answer:
D.
Step-by-step explanation:
-2(x+y)=-2*1
-2x-2y=-2
2x-3y=4
-5y=2
y=-2/5
Answer:
y=-1/4x-1/2
Step-by-step explanation:
When two lines are parallel, they have the same slope.
So for this line, we already know that the slope (m) has to equal -1/4x.
Slope intercept form is y=mx+b, where m is the slope and b is the y intercept.
in order to find the equation, we must plug in x and y to solve for b, the y intercept (the value of y when x=0).
Now, let's plug in 2 for x and -1 for y and solve for b:
-1=-1/4(2)+b=-1=-1/2+b=-1+1/2=b
b=-1/2
Hence, the answer is y=-1/4x-1/2
