Answer:
x = -3 or x = 3
Step-by-step explanation:
Subtract 9 from both sides.
x^2 - 9 = 0
Factor the left side. There is no common factor of the terms. It is a binomial which is the difference of two squares, so it factors into the product of a sum and a difference.
(x + 3)(x - 3) = 0
Set each factor equal to zero.
x + 3 = 0 or x - 3 = 0
Solve each equation.
x = -3 or x = 3
The square root of 5+1/5 (5.2, 5 1/5) is rational as it has an end you can clearly see. The square root of 5.2 is 2.28035085 exactly.
The change in the first round is -22.
The change in the second round is unknown, so we let x = the change in the second round.
When we add the two changes we get an overall change of 0.
-22 + x = 0
Add 22 to both sides of the equation.
x = 22
The change in the second round is 22 points because when you add 22 points to -22 points you get the overall change of 0 points.
Answer:
The camera with the discount is $63
Step-by-step explanation:
x/210 = 30/100
210*30= 6300
6300/100
63
1Answer: 2 times larger
Step-by-step explanation:
