Pls - 20
on-the-go phone company have two monthly plans for their customers. the ez plan costs $0.15 per minute. the 40 to go plan cost $40 per month plus $0.05 per minute.
a. write an equation to represent the point at which the monthly bills for the two plans are equal
b. which plan would you use if you wanted only 200 minutes per month?

In triangle abc, the length of side ab is 12 cm, the length of side bc is 5 cm, and the length of side ca is 9 cm. find the measure of angle a using the law of cosines.

An airplane consumes fuel at a constant rate while flying through clear skies, and it consumes fuel at a rate of 64 gallons per minute while flying through rain clouds. let c represent the number of minutes the plane can fly through clear skies and r represent the number of minutes the plane can fly through rain clouds without consuming all of its fuel. 56c+64r < 900056c+64r< 9000 according to the inequality, at what rate does the airplane consume fuel while flying through clear skies, and how much fuel does it have before takeoff? the airplane consumes fuel at a rate of gallons per minute while flying through clear skies, and it has gallons of fuel before takeoff. does the airplane have enough fuel to fly for 60 minutes through clear skies and 90 minutes through rain clouds?

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)