The table below shows the practice test scores and real test scores of 4 students. How does the mean practice test score compare to the mean real test score?
Scores on the Practice Test and Real Test
Student Practice Test Real Test
Jeff
60
70
Peter
75
90
John
55
55
Mary
80
95
Mean Practice 67.5 & Mean Real 77.5
Mean Practice 66.5 & Mean Real 77

I answered this before. 

A = 12x^{2} +55x+50

Step-by-step explanation:

b = 3x+10

h = 4x+5

A = bh

A = (3x+10)(4x+5)

A = 12x^{2} +15x+40x+50

A = 12x^{2} +55x+50

It is a second degree equation, since the major exponent is 2. In the multiplication of polynomials, it is necessary to consider their exponents, because these are added by passing the same variable, and they must always be integers