PHSI191-2-revision2

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Which of the following correctly simplifies 5x - 3x + 4x?

12x

None

Which of the following represents the correct way to divide fractions?

Subtract the numerators and multiply the denominators

Multiply the numerators and subtract the denominators

Flip the second fraction and multiply by 2.5

Multiply the first fraction by the reciprocal of the second

None

Which of the following describes the radian measure of an angle?

A fraction of the circle’s total area

The angle subtended by an arc whose length equals the radius of the circle

A measurement used only in trigonometry

The number of degrees in a full circle

None

What happens when a negative number is squared?

The result is positive

The result is negative

The result is zero

The result remains the same

None

If the base of a logarithm and the number inside the logarithm are the same, what is the result?

The base itself

Zero

Undefined

One

None

In an equation, what is the correct way to solve for an unknown variable when it appears on both sides of the equation?

Change the variable to a different letter

Subtract or add terms to isolate the variable on one side

Multiply both sides by zero

Move the variable to one side by changing its sign

None

What is the correct way to subtract fractions with different denominators?

Multiply the denominators and then subtract

Find a common denominator

Convert to a common denominator and subtract the numerators

Subtract the numerators and keep the same denominator

None

What is the result when multiplying (-2 x -5)?

-10

-7

None

What is the value of 2^-3?

1/4

0.24

1/8

None

10.

What is the cosine of a right triangle in terms of its sides?

Hypotenuse / Adjacent

Opposite / Hypotenuse

Opposite / Adjacent

Adjacent / Hypotenuse

None

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