If the nth term of a sequence is 2n + 4, what is the sum of the first n terms?

A pair of boats costs $64.99. If the sales tax is 7%, what is the sales tax on the boots?

An oil refinery aims to process 900,000 barrels of oil per day. The daily production varies by up to 50,000 barrels from this goal, inclusive. What are the minimum and maximum numbers of barrels of oil processed each day.

The mean age of three people is 22 and their median age is 20. the range of their ages is 16. how old is each person?

How many decimal places are in the product of 1.91 and 2.3? one two three four

Working her way through school, Liz works two part-time jobs for a total of 26 hours a week. Job A pays $6.40 per hour, and Job B pays $7.00 per hour. How many hours did she work at each job the week that she made $173.

Thru (4,0) parallel to y=1/2x+5

Find the vertex of this parabola y=x^2-2x

F (x) = 2x - 1 and g (x) = x2 - 3x - 2, find (f + g) (x) A. (f + g) (x) = x2 - x - 3 B. (f + g) (x) = x - 3 C. (f + g) (x) = - x - 3 D. (f + g) (x) = x2 + 5x + 3

What is 0.40x+10=45 in math

when conducting an experiment, why may one group's results be different from another group's results?