The speed of train a is 20 mph slower than the speed of train b. train a travels 230 miles in the same time it takes train b to travel 330 miles. find the speed of each train.

Katlyn made 4 dresses with 7 yards of fabric. how many yards did she use on 1 dress?

You have $600,000 saved for retirement. your account earns 5.5% interest. how much, to the nearest dollar, will you be able to pull out each month, if you want to be able to take withdrawals for 20 years?

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (-4, 0) and (6,0). the y-intercept of thefirst parabola is (0, –12). the y-intercept of the second parabola is (0-24). what is the positive difference between the avalues for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth.