An incoming MBA student took placement exams in economics and mathematics. In economics, she scored 80 and in math 88. The overall results on the economics exam had a mean of 72 and a standard deviation of 6, while the mean math score was 66, with a standard deviation of 10 On which exam did she do better compared with the other students?
Since she scored standard deviations the mean in economics and standard deviations the mean in mathematics, the did better on the
exam

linear

step-by-step explanation:

it has 4

step-by-step explanation:

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infinitely many solutions

step-by-step explanation:

we have been given the equation;

2(2x + 3) = -4 + 2(2x + 5)

we need to determine the value of x.

2(2x + 3), we expand this expression to obtain 4x + 6

similarly 2(2x + 5) will become 4x + 10

now we have;

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 10 - 4

4x + 6 = 4x + 6

the expression on the left hand side is identical to the one on the right hand side. therefore, we are looking at just a single straight line whose equation is;

y = 4x + 6

consequently, we shall have infinitely many solutions