There are 1010 people in an office with 55 different phone lines. if all the lines begin to ring at once, how many groups of 55 people can answer these lines?

Robert studied 1 2/5 hour every day for 7 days. How many hours did Roberto study in 7 days?

If Mary has a 77% in her class and she gets an 80% on a test that is worth 30% of her grade, what is her grade in the class?

A bicyclist heads east at 19 km/h. After she has traveled 24.2 kilometers, another cyclist sets out in the same direction going 30 km/h. About how long will it take the second cyclist to catch up to the first cyclist?

The average (arithmetic mean) of 0, a, and b is 2a. What is the value of b in terms of a?

You are given a quadratic trinomial expression 7x^2+42x-49. a. Factor the quadratic expression. b. What are the zeros of the quadratic trinomial? Remember to show your work. c. Explain what your solutions represent for the equation.

Factor completley x2-4x-12

6-x=15 what is x? I am trouble finding it

What is the quotient of 55 divided by 5?

With a starting amount of $975, interest rate of 5.5% after 3 years?

The product of a number and 7 is not less than 21