2a + 4b = d for b i trying to solve for b. i don't understand how to isolate the variable.

Askateboard ramp is in the shape of a right triangle what is the height of the ramp

(: the two box-and- whisker plots below show the scores on a math exam for two classes. what 2 things do the interquartile range tell you about the two classes?

Dana wants to identify the favorite professional baseball team of people in her community. she stands outside a local sporting goods store and asks every other person who enters, "what is your favorite professional baseball team? " will the results of her survey be valid? explain.