The correct next step Amy could take is to factor (x^2 - 16) on the left side of the equation to yield (x + 4)(x – 4)(x + 2) = 0.
The equation is given as:

The possible next steps are:
1. Expand the equation as follows

2. Express x^2 -16 as a difference of two squares as follows

However, the correct step in this case is to factor x^2 - 16 as a difference of two squares to give 
This is so, because the question says Amy is trying to solve for variable x.
This step will ensure that she gets the possible values of x, unlike expanding the whole equation .
Hence, the correct next step is 
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Answer:
30 students are in the science class and 3 students recieved a failing grade.
Hello!
Ok so we have y= 7/3x + 5 and initial condition of x=-3 so we just plug -3 in for x and chug along at this point! :)
y=(7/3)*(-3/1)+5= -7+5 = -2
Hope this helps! Any questions please just ask! Thank you!!
42.8% players practised more than one time a week
Step-by-step explanation:
Total no of players practising = 7
Players who practice more than once a week= 3
(According to graph player no 1,3 and 5 played more than once in a week)
To find the percentage of the players who practised more than one time a week
The formula used is:
percentage of players practising more than one time a week= ( no of player playing more than once / total no of players ) x 100%
Putting values in the formula
percentage of players playing more than one time a week=
%
=
%
= 42.8%
So, 42.8% players practised more than one time a week
Keywords: Calculation of percentage
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When b does not equal 0 it’s a non proportional relationship
y=mx+b