Subtract the smaller median (30) from the larger (55). The result, 25, is the average improvement in test scores from the pretest score to the posttest score.
<u>Answer:</u>
No solution
<u>Step-by-step explanation:</u>
Suppose the number is so ().
Now is equal to twice a smaller number plus 3. Assuming the smaller number as , we can write it as:
--- (1)
Also, the same number is equal to twice the sum of smaller number and 1:
--- (2)
Now for both of these equations, we need to find a point which satisfies them.
For example, for equation 1, take which means so the solution will be (1, 3).
Substituting the same value of y here in equation 2:
so the solution for this will be (2, 5).
It means that there is no such point which can satisfy both the equations. Hence, there is no solution possible for these two equations.
I don't exactly know how to explain step 2 but the working is:
5 - 8x < 2x + 3
5 - 3 < 2x + 8x
2 < 10x
5 < x
(I'm sorry if it's wrong)
1000 is the answer that you are looking for
51/4 is the correct answer