Question 1

Julie averaged 85 on the first three tests of the semester in her mathematics class. If she scores 93 on each of the remaining tests, her average will be 90. Which equation could be used to determine how many tests, T, are left in the semester?

30

$\frac{255+90T}{3T}$ = 93

$\frac{955+93T}{T+3}$ = 90

$\frac{255+\ 93T}{3T}$ =90

$\frac{255+90T}{T+3}$ = 93

Accepted Answer

$\frac{955+93T}{T+3}$ = 90

Answer

$\frac{955+93T}{T+3}$ = 93

Answer

$\frac{955+93T}{T+3}$ =90

Answer

$\frac{955+93T}{T+3}$ = 93

Question 2

Given i is the imaginary unit, (2 - yi)² in simplest form is

Accepted Answer

-y² - 4yi + 4

Answer

y2+4

Answer

y²- 4yi + 4

Answer

-y2+4

Question 3

The solution set for the equation $\sqrt{56\ -x}$ = x

Accepted Answer

{7}

Answer

{-7,8}

Answer

{ }

Answer

{-8,7}

Question 4

The zeros for f(x) = x⁴ - 4x³ - 9x² + 36x are

Accepted Answer

{0, $\sqrt{56\ -x}$ 3, 4}

Answer

{0,3,4}

Answer

{0, $\sqrt{56\ -x}$ 3,-4}

Answer

{0,3,-4}

Question 5

The heights of women in the United States are normally distributed with a mean of 64 inches and a standard deviation of 2.75 inches. The percent of women whose heights are between 64 and 69.5 inches, to the nearest whole percent, is

Accepted Answer

48

Answer

68

Answer

6

Answer

95

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