Which sentence does not belong with the other 3?

A.) x + 12 = 12 + x

B.) 7h = h ∙ 7

C.) 1 + a = a + 1

D.) n : 2 = 2 : n

When seven times a number is deceased by 3, the result is 25. What is the number?

The degree of the polynomial f (x) is 3, and the degree of the polynomial g (x) is 4. Find the degree of the polynomial f (x) + g (x).

You estimate that 200 people attended a school concert. The actual attendance was 240 people.

A certain virus infects one in every 300 people. A test used to detect the virus in a person is positive 70% of the time when the person has the virus and 15% of the time when the person does not have the virus.

Find the product. d j · d k

Rachel has $18.20 deducted from her paycheck every month for insurance. After 6.25 months, how much money has been deducted from Rachel's checks? O - $11.38 CO - $18.20 -$113.75 -$1,137.5

What is the approximate area, in square feet, of a circle with a diameter of 6 feet?

Daniel has 6 teaspoons of salt. The ratio of teaspoons to tablespoons is 3:1. How many tablespoons of salt does Daniel have?

The length of a rectangle is 4 units shorter than one-fourth of the width, x. Write an expression that represents the perimeter of the rectangle (use one variable and a fraction)

The lengths of a professor's classes has a continuous uniform distribution between 50.0 min and 52.0 min. if one such class is randomly selected, find the probability that the class length is less than 50.6 min.