Which of the following is the independent variable in the equation below? F(z)=9z+28

A. F

B. 9

C. 28

D. z

Answer Explanation:

Given the equation F(z)=9z+28

To find the value of F(z), we need to vary the value of z. In this case, z is the independent variable while F(z) is what we measure, which is the dependent variable.

Therefore, the Correct Answer is D.

Q #1: Solve for w in the equation below.

A. w=rxy+z

B. w=(x/ry)+(z/r)

C. w=y(z+rx)

D. w=(x/ry)-(z/r)

Answer Explanation

We are asked to make w the subject of the formula.

First, we rearrange the equation by to ensure w is on the right hand of the equation.

Then, divide both sides by r

Multiply both sides by y

The above equation can be rearranged into

Thus, the formula for finding the value of w is (x/ry)-(z/r).
Q #2: Which of the following is the appropriate unit of measure to express the weight of a knife?

A. Liter

B. Milliliter

C. Gram

D. Kilogram

Answer Explanation

The weight of the knife could be appropriately expressed in grams. Since a knife is a small object, we do not expect to measure its weight in kilograms. Liter and milliliter are units of measuring the volume of objects.
Q #3: Which of the following is the decimal form of 58.7%?

A. 0.587

B. 5,870

C. 5.87

D. 587

Answer Explanation

percentages are fractions with denominator equal to 100. To get the decimal form of the percent given, e divide the value by 100.

The decimal form of 58.7% is 0.587.