Answer:
11 + 2x
Step-by-step explanation:
In algebra, like terms are terms that have the same variables (letter after the number). Like terms can be combined for example the 6 and 5 have the same variable (none) so they can be combined. IMPORTANT! While we do combine the 2x and the 4x since the 2x came after a minus sign we consider it a negative, so -2x + 4x (or 4x - 2x) is 2x NOT 6x
Answer:
x= - 1/c
Step-by-step explanation:
First we have to find how much water leaked
5galllons-3 gallons=2 galllos of water leaked
Now we know

Finally we can simplify it

- its the answer
One way to find this is to plug in the points into each of the answers and see which one is correct:
A. First, plug in the point (-2,8). y = 8, x = -2

A works for the first point.
Then plug in the second point: x =0, y = -4

A works for the second point.
Then plug in the third point: x = 4, y = 68

A works for the third point, so A is the answer.
But we should double-check the other answers too.


B does not work.

C does not work.

D does not work.
Therefore, A is the answer
Answer:
x = 1.47 or x = -7.47
Step-by-step explanation:
x²+6x+9=20
This is a quadratic equation
x²+6x+9-20=0
x²+6x-11=0
Step 1 : Write the quadratic formula
x = <u>-b±√b²-4(a)(c)</u>
2a
Step 2 : Substitute values in the formula
a = 1
b = 6
c = -11
x = <u>-6±√6²-4(1)(-11)</u>
2(1)
x = <u>-6±√80</u>
2
x = -3 + 2√5 or x = -3 - 2√5
x = 1.47 or x = -7.47
!!