during a 500-meter race, a runner ran the first 400 meters in 1 minute and 25 seconds. she finished the race i 2 minutes and 15 seconds. what was her average rate of change during the last 100 meters of the race as a decimal

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