C <span>represents the unit rate
hope that helps</span>
A positive plus a negative will equal a negative #.
1+-2= -1
Solution :
Group Before After
Mean 693.75 743.75
Sd 155.37 143.92
SEM 54.93 50.88
n 8 8
Null hypothesis : The preparation course not effective.

Alternative hypothesis : The preparation course is effective in improving the exam scores.
(after - before)
Answer:
.
Step-by-step explanation:
We have been an division problem:
.
We will simplify our division problem using rules of exponents.
Using product rule of exponents
we can write:


Substituting these values in our division problem we will get,

Using power rule of exponents
we will get,


Using product rule of exponents
we will get,


Using power rule of exponents
we will get,



Using quotient rule of exponent
we will get,


Therefore, our resulting quotient will be
.
The value of constant a is -5
Further explanation:
We will use the comparison of co-efficient method for finding the value of a
So,
Given

As it is given that
(x^2 - 3x + 4)(2x^2 +ax + 7) = 2x^4 -11x^3 +30x^2 -41x +28
In this case, co-efficient of variables will be equal, so we can compare the coefficients of x^3, x^2 or x
Comparing coefficient of x^3

So the value of constant a is -5
Keywords: Polynomials, factorization
Learn more about factorization at:
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