r + 0.12 = 0.20 what number is r

The recommended time to take a math test is 23 minutes. you complete it in 18 minutes. what is the percent change between your time and the recommended time?

2.62kg=k how many grams is it

Solve for y: - (4y+20) + 19=-y+17

How can the effect of an outlier be overcome in an experiment that examines a random sample of a population? A) Discard 50% of the data. B) Examine a larger random sample of the population. C) Examine a smaller random sample of the population.

Brian has a piece of yarn that is 48 inches long. How many feet long is his piece of yarn?

Find and interpret the marginal frequencies.

On a recent Saturday, a total of 1086 people visited a local library. Of these people, 269 were under age 10, 466 were aged 10-18, 185 were aged 19-30, and the rest were more than 30 years old. One person is sampled at random.

A company sells desks for $155 each. To produce a batch of x desks, there is a cost of $83 per desk and a fixed or setup cost of $9,300 for the entire batch. Determine a function that gives the profit in terms of the number of desks produced.

Find the perimeter of a triangle xyz (0,2) (4,-1) (-2,-1)

Consider two circles, a smaller one and a larger one. If the larger one has a radius that is 15 feet larger than that of the smaller circle and the ratio of the circumferences is 4 colon 1, what are the radii of the two circles?