Answer:
See the graph and explanation below.
Step-by-step explanation:
For this case we have the following function:
We can calculate some points in order to see the tendency of the graph, we can select a set of points for example 
and we can calculate the values for f(x) like this
x=-2
x=-1.5
x=-1
x=0
This point correspond to the y intercept.
x=1
x=2
We don't have x intercepts for this case since the functionnever crosses the x axis.
And then we can see the plot on the figure attached.
The expression equivalent to given expression is 
<em><u>Solution:</u></em>
Given expression is:
We are asked to find the expression equivalent to given expression
Assume that denominator does not equal to zero
We can apply the exponent rule in given expression
Apply the above rule in given expression
Thus the equivalent expression is found
A.) 120
The variance is the range of a data set, which shows how spread out numbers are. To get the variance, we take the last number and subtract it from the first number. 160-40=120. Therefore, there is 120 numbers between 40 to 160.
36% because 65 is nearer to the whole number
Let x be the score of the 3rd quiz,, then the average score will be:
(83+91+x)/3, which = (174+x)/3. but this average should be greater or equal to 85 and smaller or equal to 90:
85 ≤ (174+x)/3 ≤ 90
1st multiply all terms with 3 → 255 ≤(174+x) ≤ 270
2nd subtract 173 from all terms → 255-174 ≤174-174+x ≤270-174
81 ≤ x ≤ 96
