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Which of the following is the equivalence in pounds for 50 kg? (2.2 lb=1 kg)

A. 52.2 lb

B. 22.7 lb

C. 110 lb

D. 220 lb

Answer Explanation:

We are asked to convert kg to pounds using the given relation. Letting x to represent the lb we are looking for.

Nest, we set the proportion with kg in the numerator and lb on the denominator as follows.

We find the value of x by cross-multiplication

The value of x is 110 lb.

Therefore, the Correct Answer is C.

Q #1: 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.
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: -2/9, -0.9, -1.7, -4/7 Of the number listed above, which number is the greatest?

A. -0.9

B. -4/7

C. -1.7

D. -2/9

Answer Explanation

The initial step is to convert the decimal options to fractions. Then, we find the LCM of the denominators of all fractions, which will be used to compare the values of the given options.

-0. becomes -9/10

-1.7 becomes -17/10

Then, the resulting denominators are 9, 10, and 63. Their LCM of 630 is used to multiply each fraction.

-2/9*630=-140

-9/10*630=-567

-17/10*630=-1071

-4/7*630=-360

From the calculations above, -140 is the greatest value of all the values. Thus, -2/9 is the greatest number.

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