Which of the following is the equivalence in pounds for 55 kg? (2.2 lb=1 kg)

A. 82.2 lb

B. 22.6 lb

C. 121 lb

D. 242 lb

Answer Explanation:

We are asked to convert kg to pounds using the given relation. If we let x to represent the lb we are asked to find, we set the proportion equation with kg on numerator and lb on the denominator as follows.

The equivalent value of 55kg is 121 lb.

Therefore, the Correct Answer is C.

Q #1: Solve for z in the equation above.

A. z=rwy+x

B. z=rw+(y/x)

C. z=y(x+rw)

D. z=rw-(y/x)

Answer Explanation

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

First, we subtract y/x from both sides of the equation

Thus, the formula for finding the value of z is .
Q #2: To determine the cost of a phone, the seller considers the brand name, size of the RAM, and size of the battery. Which of the following is the dependent variable?

A. Cost of a phone

B. Brand name

C. Size of the RAM

D. Size of the battery

Answer Explanation

A dependent variable is one that changes when another variable changes. In this case, the cost of the phone will change depending on the change in brand name, size of the RAM, and size of the battery. Thus, cost of a phone is a dependent variable.
Q #3: A person weighed themselves at 176 lb. Four months later they weighed themselves at 186 lb. Which of the following is the percent of weight the person gained over 4 months? (Round to the nearest percent.)

A. 6%

B. 10%

C. 11%

D. 9%

Answer Explanation

we are asked to find the percent change in weight gain of a person.

First, we need to find the change in weight gained over the 4 months

Change in weight= 186-176=10 lb

The percent change is expressed as change in weight over original weight *100. Then

The percent change in weight is 6% to the nearest whole number.