Acar goes 15 miles on a gallon of gas when it is driven at 50 miles per hour. when the car is driven at 60 miles per hour it only goes 80% as far. how many gallons of gas will it take to travel 120 miles driving at 60 miles per hour?

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

Solve 3x-18=2y and 5x-6y=6 by elimination show work

Aright triangle has an area of 21 m2. the dimensions of the triangle are increased by a scale factor of 4. what is the area of the new triangle