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10y-3(y+5)
Distribute the -3.
-3*y= -3y -3*5= -15
10y-3y-15
7y-15
"A" is the answer.
~'Manda
Answer:
x = 2, y= 3
Step-by-step explanation:
y = -2x+7
y = 5x-7
Since the equations are both equal to y, set them equal to each other
-2x+7 = 5x-7
Add 2x to each side
-2x+7 +2x= 5x+2x-7
7 = 7x -7
Add 7 to each side
7+7 = 7x
14 = 7x
Divide by 7
14/7 = 7x/7
2 = x
Now find y
y = 5x-7
y = 5*2 -7
y = 10-7
y =3
We are given the equation:
x^2 + 10x + 11 = m + (x-5)^2 - 25
To determine the value of m, assign a value of x and solve for m
if x = 1, the equation becomes
1^2 + 10(1) + 11 = m + (1 -5)^2 - 25
solve for m
m = 31
When m = 31, the equation is true. <span />