Answer: x = -4, x = 5
Step-by-step explanation:
You can use the substitution method for this problem.
y = + 2x, but y also = 3x +20.
Because of this, you can determine that +2x = 3x + 20 because they are both equal to the same thing, y.
Solve the quadratic equation you got from substitution:
+ 2x = 3x + 20
-x = 20
-x -20 = 0
You can factor this equation:
(x+4)(x-5) = 0
x = -4, x = 5
ANSWER
EXPLANATION
We want to solve for the length, l, in the formula for the area of a rectangle:
We simply want to make the length the subject of the formula. To do this, divide both sides of the formula by w:
That is the answer.
Answer:
I hope I helped sorry l didn't understand question number 19
A linear equation is an equation that represents a line. A linear equation has a variable raised to the 1st power.
For example, Y = 2x, Y = x + 1, Y = 8x - 3 are examples of linear equations.
However, something like and
seem to have a variable raised to the 1st power, but they're not linear.