Answer:
(9,126)
Step-by-step explanation:
Make sure x and y are on the same side
Eliminate y by multiplying the first equation by 4 then adding both equations together
Plug the x value (9) into one of the equations
Solve
x=9, y=126
(9,126)
Okay, here we have this:
Considering the provided information, we are going to calculate how many minutes does it take per page to print, so we obtain the following:
Then from the statement we are going to calculate the time per page using the following formula:
Time per page = Total time / Total pages
Replacing:
Time per page = 7 minutes / 20 pages
Time per page = 0.35 minutes per pages
Finally we obtain that it take 0.35 minutes per page.
Your answer would be B. -x² - 2x + 16
If we look at the terms separately, you can add them separately, so:
4x² + -5x² = -x²
0 + -2x = -2x
9 + 7 = 16
I hope this helps!
Answer:
Step-by-step explanation:
H0 : μ = 46300
H1 : μ > 46300
α = 0.05
df = n - 1 = 45 - 1 = 44
Critical value for a one tailed t-test(since population standard deviation is not given).
Tcritical = 1.30
The test statistic :(xbar - μ) ÷ (s/sqrt(n))
The test statistic, t= (47800-46300) ÷ (5600√45)
t = 1500
t = 1500 / 834.79871
t = 1.797
The decision region :
Reject H0: if t value > critical value
1. 797 > 1.30
Tvalue > critical value ; We reject H0
Hence, there is sufficient evidence to conclude that cost has increased.
9514 1404 393
Answer:
no real solutions; k = ±i(2/3)√15
Step-by-step explanation:
If k is one of the roots, then substituting it for x will satisfy the equation:
k -4k -20/k = 0
Multiplying by k gives ...
-3k^2 -20 = 0
k^2 = -20/3 = -6 2/3
There are no real values of k such that this is true.
__
If we allow k to be imaginary, then ...
k = ±i√(20/3) = ±i(2/3)√15
Possible imaginary values of k are ±(2/3)√15.