-7x - 2y = 19
4x + y = -12
Set y equal to each other (opposite signs are fine and you could also set x equal instead of y)
-7x - 2y = 19
8x + 2y = -76
Add equations together
x = -52
Plug x value into an equation
4(-52) + y = -12
Solve for y
-208 + y = -12
y = 196
Hope this helps! ;)
Answer:
15
Step-by-step explanation:
Okay, so we know that Base*Length=Area, so we just have to divide the area by the base, so the formula here is Area/Base=Length.
That would get us 120/8=Length,
and if we just divide 120 by 8 we get 15, so the length is 15
Answer:
Option B,C and E are solution to given inequality 
Step-by-step explanation:
We need to check which ordered pairs from given options satisfy the inequality 
Ordered pairs are solutions to inequality if they satisfy the inequality
Checking each options by pitting values of x and y in given inequality
A ) (1, -5)

So, this ordered pair is not the solution of inequality as it doesn't satisfy the inequality.
B) (-3, - 2)

So, this ordered pair is solution of inequality as it satisfies the inequality.
C) (0, -9)

So, this ordered pair is solution of inequality as it satisfies the inequality.
D) (2, -1)

So, this ordered pair is not the solution of inequality as it doesn't satisfy the inequality.
E) (5, 4)

So, this ordered pair is solution of inequality as it satisfies the inequality.
So, Option B,C and E are solution to given inequality 
Answer:

Step-by-step explanation:

Answer:
x=2;DE,EF=9,DF=5
Step-by-step explanation:
Since DEF is isoceles, you can set the equations
x+7 and 2x+5 equal to each other
x+7=2x+5, now solve for x
-x=-2,
x=2, now plug in for each side
DE,EF=9
DF=3(2)-1=5