Answer:
A
Step-by-step explanation:
Carlos' score was 2 standard deviations from the mean, so his z-score was 2.0. You can either use the empirical 68-95-98.5 rule, or you can plug it into your calculator as <u>normalcdf(-999, 2) = .977</u>
So 97.7% of people had a score lower than Carlos!
.977 * 1.5 million = 1,465,500 people
I will like to help u cause I’m good with graphing but I don’t really understand what is ur question
Distribute (2x+y) throughout (4x^2-2xy+y^2). You should get
8x^3-4x^2y+2xy^2+4x^2y-2xy^2+y^3
Simplify and collect like terms and you should get 8x^3+y^3
Answer:
A
Step-by-step explanation:
Given
5x² - 45 ← factor out 5 from each term
= 5(x² - 9)
x² - 9 is a difference of squares and factors in general as
a² - b² = (a + b)(a - b), thus
x² - 9
= x² - 3² = (x + 3)(x - 3)
and
5x² - 45
= 5(x + 3)(x - 3) → A
