Answer:
0.5818
Step-by-step explanation:
Suppose the average teenage romantic relationship is normally distributed with a mean number of 100 days with a standard deviation of 30 days.
Answer:
The z score is used to determine how many standard deviations that the raw score is above or below the mean. If the z score is positive then the raw score is above the mean and if it is negative then it is below the mean. It is given by:

Given that:

Therefore, from the normal distribution table, P(90 < x < 150) = P(-0.33 < z < 1.67) = P(z < 1.67) - P(z < -0.33) = 0.9525 - 0.3707 = 0.5818
y = ∛ (x + 6 - 3) = ∛ (x +3) -----------> graph this
(see attached)
Check: from formula above, when x = -3, y = 0
Check that this point exists on the graph... it does (check OK!)
edit reason: typo
Answer:
Yes
Step-by-step explanation:
It is a linear graph.
Answer:
y^2 +7y-30
Step-by-step explanation:
Step 1: Use FOIL
y·y = y^2
y· 10= 10y
-3·y= -3y
-3·10= -30
Step 2: <em>combine like terms</em>
y^2+ 10y-3y-30
7^2+ 7y-30
and thats all :)
hope this helped
Answer:
30 (I think you mistyped one of the answer choices)
Step-by-step explanation:
170+10=180
180÷6=30