Answer:
A = (2x² + 4x + 1) (8 − x)
A = -2x³ + 12x² + 31x + 8
Step-by-step explanation:
W = 2x² + 4x + 1
L = 8 − x
Area is width times length.
A = (2x² + 4x + 1) (8 − x)
If you wish, you can simplify with distribution.
A = 8 (2x² + 4x + 1) − x (2x² + 4x + 1)
A = 16x² + 32x + 8 − 2x³ − 4x² − x
A = -2x³ + 12x² + 31x + 8
Simplify brackets
(7w - 2 - w = 2(3w - 1)
simplify 7w - 2 - w to 6w - 2
(6w - 2 = 2(3w - 1)
Expand
(6w - 2 = 6w - 2)
Since both sides are equal, there are infinitely many solutions
Answer: C) INFINITELY MANY
Answer:
The 90% confidence interval for the population mean iron concentration is between 0.167 cc/m³ and 0.195 cc/m³.
Step-by-step explanation:
We have that to find our 
level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of 
.
So it is z with a pvalue of 
, so 
Now, find M as such
In which 
is the standard deviation of the population and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 0.181 - 0.0140 = 0.167 cc/m³.
The upper end of the interval is the sample mean added to M. So it is 0.181 + 0.0140 = 0.195 cc/m³.
The 90% confidence interval for the population mean iron concentration is between 0.167 cc/m³ and 0.195 cc/m³.
Answer:
y=f−11/c
Step-by-step explanation:
cy+11=f
Step 1: Add -11 to both sides.
cy+11+−11=f+−11
cy=f−11
Step 2: Divide both sides by c.
cy/c=f−11/c
y=f−11/c
Answer:
y=f−11/c i think
Answer:
need to see problem please
