Answer:
50
Step-by-step explanation:
107+23= 130
180-130= 50
You're welcome :P
Point slope form is
y - y1 = m(x - x1) where m = slope and (x1, y1) is a point on the line.
Plugging in the given values:-
y - 1.4 = 1.8(x - (-4.5))
y - 1.4 = 1.8(x + 4.5) So the correct choice is A.
Given that mean=56.1 and standard deviation=8.2, P(x>67.5) will be found as follows:
The z-score is given by:
z=(x-μ)/σ
thus the z-score will be given by:
z=(67.5-56.1)/8.2
z=11.4/8.2
z=1.39
thus
P(z=1.39)=0.9177
thus:
P(x>67.5)=1-P(z>0.9177)
=1-0.9177
=0.0823
Answer: A. 0.0823
