Answer:
24
Step-by-step explanation:
I don't really know how to explain sorry qwq
2

Suggesting that you want this in standard form, in terms of quadratic equations, you would technically follow a process similar if not almost exactly like the 2 - step equation method with the exception of separating the (x)s and the equations to find x and then plug it in and what-not.
With that being said you would subtract 5 in (x+5) from said 5 in the second equation and -10 in the first equation in order to get 2x^2+7x-15, you would continue to do the same for the x by subtracting it from both ends making the 7x a 6x because there is a 1 at the beginning of each x if there is no number that is shown already. Which finally gives you the equation (y= 2x^2+6x-15)
Answer:
D
Step-by-step explanation:
X+2y=10
-4x-y=2
first, isolate x in first equation: x=10-2y
substitute value of x in first equation (10-2y) into second equation:
-4(10-2y)-y=2
-40+8y-y=2
7y=42
y=6
put value of y (6) into either equation to solve for x
x+2(6}=10
x+12=10
x=-2
x=-2, y=6
prove by inserting x and y values into either equation
-4x-y=2
-4(-2)-6=2
8-6=2
2=2
or
x+2y=10
-2+2(6)=10
-2+12=10
10=10