The number of <span>possible combinations can be calculated by formula

.
</span>
<span>There are eight different concert dates that Jen could attend, then n=8.
</span>
Jen <span>can only afford to see three shows, then k=3
</span>
and<span>
</span>
<span /><span /><span>

</span><span />
<span>Answer: 56 possible combinations.</span>
Note: Steps of student are not given. So, the proper steps of the solution are provided below.
Given:
The inequality is

To find:
Where the student made any errors?
Solution:
We have,

On dividing both sides -5 change the sign of equality because -5 is a negative number.


Therefore, the solution of given inequality is
.
They can but sometimes they dont
Taking the change in y over the change in x. Then the correct option is A.
<h3>What is the equation of a line passing through two points?</h3>
Suppose the given points are (x₁, y₁) and (x₂, y₂), then the equation of the straight line joining both two points is given by
![\rm (y - y_1) = \left [ \dfrac{y_2 - y_1}{x_2 - x_1} \right ] (x -x_1)](https://tex.z-dn.net/?f=%5Crm%20%28y%20-%20y_1%29%20%3D%20%5Cleft%20%5B%20%5Cdfrac%7By_2%20-%20y_1%7D%7Bx_2%20-%20x_1%7D%20%5Cright%20%5D%20%28x%20-x_1%29)
The equation of the line can be determined by the two known points.
Taking the change in y over the change in x.
Then the correct option is A.
Learn more about straight-line equations here:
brainly.com/question/380976
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