Solve for y by setting one equation =to X after that you can substitute the equation into the other one let's set the first one in X= FORM
X-7y=10
-2x+14y=-20
Add 7y to both sides of the first equation to let x stand alone
X=7y+10
Now you can substitute x on the second equation
-2 (7y+10)+14y=-20
Distribute
-14y-20+14y=-20
Add and simplify
Us cancel out =0
-20=-20
0=0
They are the same equations you can also divide the second equation by -2 which would make it look like this
X-7y=10
-2 (x-7y=10)
Let me know if I have answered your question
Answer:
Length = 7 inches
Step-by-step explanation:
Perimeter = 2L+2W
Perimeter = 26
W = 6
Plug these in: 26=2L + 2*6 ; 26 = 2L + 12
Subtract 12 from both sides.
26-12 = 2L +12 -12 ; 14 = 2L
Devide by 2
14/2 = 2L/2
L=7
Answer:
5(3 + 13)
Step-by-step explanation:
So,
You have to undistribute a common factor in all of the terms.
2a + 2b
There is a 2 in each term.
Undistribute.
2(a + b)
Answer:
Normally, Acceleration due to gravity is
or
Step-by-step explanation:
From the web
These two laws lead to the most useful form of the formula for calculating acceleration due to gravity: g = G*M/R^2, where g is the acceleration due to gravity, G is the universal gravitational constant, M is mass, and R is distance
