Answer:
Yes, I believe the answer is C because that is the only one that sounds reasonable.
If it were any of the other answers than it would either be intersecting or on the exact line and it is supposed to be perpendicular mean never touching.
Answer:
(a)P(x>85.55)=0.02275
(b)
Step-by-step explanation:
We are given that
Average sales for an online textbook distributor per customer per purchase
,
$67.63
Standard deviation of the amount spent on textbooks,
$8.96
(a) We have to find probability for a randomly selected customer spent more than $85.55 per purchase.
=
=
=
P(x>85.55)=0.02275
(b)We have to find probability for a randomly selected customer spent less than $76.59 per purchase
Answer:
The answer is A. 5 notebooks and 13 pencils
Step-by-step explanation:
1. Identify your x and y variables.
x - number of notebooks
y - number of pencils
2. Set up two equations to come up with a system of linear equations.
x + y = 18
2.3x + 1.25y = 27.75
3. In order to solve for one of the variables (either x or y), multiply the first equation with the additive inverse (when added together, the answer is zero; one number will be positive while the other number will be negative) of the coefficient of either x or y, so you can eliminate that variable. In this case, I choose the coefficient of y which is 1.25. So, the first equation will look like this:
-1.25(x + y) = 18
-1.25x - 1.25y = -22.50
4. Next, eliminate the y variable and solve for x.
-1.25x - 1.25y = -22.50
2.3 x + 1.25 y = 27.75
__________________
<u>1.05</u> x = <u>5.25</u>
1.05 1.05
x = 5 Joanna bought 5 notebooks.
5. Then, solve for y.
5 + y = 18
y = 18 - 5
y = 13 Joanna bought 13 pencils.
If you want to check your work, just plug in 5 and 13 into one of the two original equations. Simplify the equations, and you should get a true statement.
5 + 13 = 18
18 = 18
Answer:
c
Step-by-step explanation:
Answer:
x = 5
Step-by-step explanation:
12x - 6 + 6 = 54 + 6
12x = 60
12/12 = 60/12
X = 5
