Step-by-step explanation:
Z-score is calculated by the following formula:
Z = (X-mu)/sigma
where
X = data value
mu = mean
sigma = standard deviation
Given:
mu = 500
sigma = 100
X = 680
Z-score = (X-mu)/sigma = (680-500)/100 = 180/100 = 1.8
Answer:
Really does depend so i guess its D all of the choices
Answer:
on https://www.storyofmathematics.com it says
To simplify any algebraic expression, the following are the basic rules and steps:
Remove any grouping symbol such as brackets and parentheses by multiplying factors.
Use the exponent rule to remove grouping if the terms are containing exponents.
Combine the like terms by addition or subtraction.
Combine the constants.
Answer:
3x² + 2xy
Step-by-step explanation:
x² + 3xy + 2x² - xy
3x² + 2xy
Answer:
15°, 75°
Step-by-step explanation:
The range of a projectile on level ground is:
R = v₀² sin(2θ) / g
For a range of R/2 at the same initial velocity:
R/2 = v₀² sin(2A) / g
Dividing the second equation by the first:
(R/2) / R = sin(2A) / sin(2θ)
1/2 = sin(2A) / sin(2θ)
sin(2A) = 1/2 sin(2θ)
The maximum range is when θ = 45°.
sin(2A) = 1/2 sin(90°)
sin(2A) = 1/2
2A = 30°, 150°
A = 15°, 75°