What words are accepted without proof in a logical system

A hotel shuttle service charges $7.50 plus $0.85 per mile. A customer hires a shuttle for a ride to the airport and the total charge is $12.60. Which equation can be used to determine the number of miles from the hotel to the airport?

The discriminant of x2 + 6x + 9 = 0

Suppose you want your daughter's college fund to contain $125,000 after 14 years. I you can get an APR of 7.8%, compounded monthly, how much should you deposit at the end of each month?

Compare the interger 3 and - 3

What is the volume of a cylinder with a radius of 7 cm and height of 10 cm? In terms of pi.

On a scale drawing with a scale of 1/64, the height of a building is 7.8 inches. How tall is the actual building?

What is the equation of the line if the line passes through (4, 4) and the y-intercept is - 4.

Which of the following values is closest to the variance for the set of data shown below? 23, 32, 20, 43, 41, 66, 63, 59, 54, 36, 45, 61, 55, 44, 47 A. 195.4 B. 197.7 C. 212.6 D. 225.9

You have two ways to drive home from school: Route A is usually quicker; Route B is scenic but slower. You choose Route A on 60% of your days and this gets you home by 4:00 P. M. 80% of the time. When you choose Route B you get home by 4:00 P. M.

How many terms does the binomial expansion of (x^2+7y) ^9