I will go about solving this using the elimination method.
First, convert the equations.
10x + y = -20
4x + y = -12
Second, find the easiest variable to get rid of and get rid of it! (In this case, y) We will subtract to get rid of y.
6x = -8
Third, you want to solve the equation.
6x = -8 (divide by 6)
x =

Fourth, solve for y by inserting the answer for x into one of the equations.
10(

) + y = -20

+ y = -20 (subtract

)
y =

The solution for this system of equations is (

,

).
-2(2x-1)(x+3) = ((-2)2x - (-2)(-1))(x+3) = (-4x-2)(x+3)
To find the average: the sum of the values/number of values
=250+310+275+195/4
=257.5
Answer:
64-degree ( Alternate angles)
Answer: The value of John's silver collection changes at a faster rate than the value of John's baseball card collection.
V = 500(1.05)2t + 600(0.95)t
Step-by-step explanation: