Answer:
no problem :) have a nice day
Step-by-step explanation:
Which is a true statement?
1 answer:
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Answer:
a) 90.1
b) $35.6
c) 3.0915 hours
Step-by-step explanation:
The z-score measures how many standard deviations a score X is above or below the mean.
It is given by the following formula:
In which is the mean and
is the standard deviaition.
In all three cases, we have to find X
a. Final exam scores: Allison’s z-score = 2.30, μ = 74, σ = 7.
b. Weekly grocery bill: James’ z-score = –1.45, μ = $53, σ = $12.
Mean and standard deviation in dollars, so the answer also in dollars.
c. Daily video game play time: Eric’s z-score = –0.79, μ = 4.00 hours, σ = 1.15 hours.
Mean and standard deviation in hours, answer in hours.
Answer with Step-by-step explanation:
We are given that
O(0,0),P(3,-1) and Q(2,3) on the coordinate plane.
Mark point O(0,0), P(3,-1) and Q(2,3) on the graph and then join OP,PQ and OQ.
b.We have to find OP and OQ are perpendicular or not.
Slope-formula:
By using the formula
Slope of OP=
Slope of OQ=
When two lines are perpendicular then
Slope of one line=
Slope of line OP
Hence, line OP and OQ are not perpendicular.
