Answer:
13(4x-13)
if you distribute it then you come back with 52x-169.
Plant grows at 3CM per day
equation: y= 3x
21 is y so 21= 3x. divide by 3 so it's been 7 days
Answer:
a.1.90 years
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:
![\alpha = \frac{1-0.99}{2} = 0.005](https://tex.z-dn.net/?f=%5Calpha%20%3D%20%5Cfrac%7B1-0.99%7D%7B2%7D%20%3D%200.005)
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 ![z = 2.575](https://tex.z-dn.net/?f=z%20%3D%202.575)
Now, find the margin of error M as such
![M = z*\frac{\sigma}{\sqrt{n}}](https://tex.z-dn.net/?f=M%20%3D%20z%2A%5Cfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D)
In which
is the standard deviation of the population and n is the size of the sample.
In this question:
![n = 25, \sigma = 3.8](https://tex.z-dn.net/?f=n%20%3D%2025%2C%20%5Csigma%20%3D%203.8)
So
![M = 2.575*\frac{3.8}{\sqrt{25}} = 1.90](https://tex.z-dn.net/?f=M%20%3D%202.575%2A%5Cfrac%7B3.8%7D%7B%5Csqrt%7B25%7D%7D%20%3D%201.90)
So the correct answer is:
a.1.90 years
You used to say "y = 2x + 3; solve<span> for y when x = –1". Now you say "f(x) = 2x + 3; find f(–1)" (pronounced as "f-of-x is 2x plus three; find f-of-negative-one"). You do exactly the same thing in either case: you plug in –1 for x, multiply by 2, and then add the 3, simplifying to get a final value of +1.
Brainliest?</span>
Answer:
3x+2x=95
5x=95
X=19
Step-by-step explanation:
it may help you to understand