Answer:
21
Step-by-step explanation:
f(x) = 6+3x
f(5) = 6+3(5)
= 6 + 15
= 21
Hope it helps
Answer: area
Step-by-step explanation:
Area is solved with L * W
Volume is solved with L * W * H
Using these formulas we can see that area uses 2-dimensions, the length and the width, while volume uses 3.
One of the roots of a quadratic equation is 7 - √3.
Because rational roots occur in conjugate pairs, the other root is 7 + √3.
The quadratic equation is
(x -(7-√3))(x - (7+√3))
= x² - (7+√3)x - (7-√3)x + (49-3)
= x² - 7x - (√3)x - 7x + (√3)x + 46
= x² - 14x + 46
Answer: x² - 14x + 46
-7 and -5.
(-7)(-5) = 35
-7 + (-5) = -12
Answer:
We are confident at 90% that the true mean for the amount spent on medicines is between (4568.96 and 4631.04)
Step-by-step explanation:
Information given
represent the sample mean for the amount spent on medicines
population mean
s=800 represent the sample standard deviation
n=1800 represent the sample size
Solution
The confidence interval for the true population mean is given by:
(1)
We can calculate the degrees of freedom with:
We know that the Confidence level is 0.90 or 90%, the value of significance is 
and 
, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.05,1799)".And we see that 
Replcing in the formula for the confidence interval we got:
We are confident at 90% that the true mean for the amount spent on medicines is between (4568.96 and 4631.04)
