Answer:
X= 2 Y=5
Step-by-step explanation:
Set them equal
-2x+9=4x-3 add -2x to both sides and -3 to both sides
12=6x then divide by 6
x=2
plug in 2 to either equation and solve for Y.
Y=-2(2)+9
Y=5
Let us evaluate each pair of expressions one at a time.
8. (n²+4) - n² and 4n.
(n²+4) - n² = n²+ 4 - n² = 4 which is not equal to 4n.
NOT EQUIVALENT
9. 3x + 5 and 2(x + 3)
2(x + 3) = 2x + 6 which is not equal to 3x + 5.
NOT EQUIVALENT
10. 15 - 6x and 15(1 - 6x)
15(1 - 6x) = 15 - 90x which is not equal to 15 - 6x
NOT EQUVALENT
11. (y + y + 2 + y) + 3y and 6y + 2
(y +y +2 + y) + 3y = y+y+y +2 + 3y = 3y + 2 + 3y = 6y + 2.
It matches the other expression.
EQUIVALENT
12. 8y - 3 + 10y and 3(6 - 1)
8y - 3 + 10y = 8y + 10y - 3 = 18y - 3
3(6 - 1) = 3(5) = 15
The two expressions do not match.
NOT EQUIVALENT.
Answer: Only the expressions in number 11 are equivalent.
A. Slope = 2
b. Slope = 2/3 or 0.66
(Slope = change in y / change in x)
The legs are defined by 
. The Hypotenuse if defined by 
. The perimeter is defined by:
D. P(x) = 2x √2 + 4x
