Answer:
2x is your slope and -8 is your y intercept
Step-by-step explanation:
Answer:
A
Step-by-step explanation:
Given
- 1 ← a difference of squares which factors in general as
a² - b² = (a - b)(a + b)
here = (x²)² ⇒ a = x² and b = 1
- 1 = (x² - 1)(x² + 1)
x² - 1 ← is a difference of squares and factors as
x² - 1 = (x - 1)(x + 1), so
(x² - 1)(x² + 1) = (x - 1)(x + 1)(x² + 1), hence
- 1 = (x - 1)(x + 1)(x² + 1) → A
Answer:
900
Step-by-step explanation:
The ratio of the number of people who own a smartphone to the number of people who a flip phone is 5:3.
Let the number of people who own a flip phone=x
If 600 more people own a smartphone than a flip phone, then the number of people who own a smartphone=x+600
To find x, we express the ratio and population as an equality.
5:3=x+600:x
Expressing the ratios as fractions would give:
Next, we cross multiply
5x=3(x+600)
Open the brackets by expansion.
5x=3x+(3 X 600)
5x=3x+1800
Subtract 3x from both sides.
5x-3x=3x-3x+1800
2x=1800
Divide both sides by 2
x=900.
Since x=900, the number of people who own a flip phone is 900.
Answer:
Because 4 is a perfect square
Step-by-step explanation:
When simplifying a radical, you have to look for perfect squares. 4 is a perfect square but x is not. Variables are only perfect squares if they have even numbered exponents so the x has to stay in the radical.