The cost of gasoline varies directly with the number of gallons bought. If 5 gallons of gasoline cost $18.00, find the cost of 20 gallons.

How do you figure out basketball stats?

The ages of three brothers add up to 38 years. The oldest brother is 5 years older than the youngest brother. Five years ago, the oldest was twice the age of the youngest.

2 ((5+3) (2+4)) 2 (5+3 (2+4)) solve

What's the commutative property

Tyna simplified the expression StartFraction 3 x cubed Over 12 x Superscript negative 2 Baseline EndFraction to StartFraction x Over 4 EndFraction. What was Tyna's mistake?

List the amplitude, period, phase shift and vertical shift of the function (t) = 5 sin 2t.

Simplify s7 4 1216-10-7-5 6

Best Buy sells CDS and DVDS. Jose bought 3 CDs and 2 DVDs for $58. Lisbeth bought 1 CD and 4 DVDs for $46. Determine the selling price for each

There is a 40% chance that you will be elected president of the history club. There is a 10% chance that your friend will be elected treasurer of the history club. You use a random number generator to randomly generate 50 numbers from 0 to 99.

Car A travels 105 miles on 3 gallons of petrol. Car B travels 80 miles on 9 litres of petrol. which car has the better petrol consumption (ie more miles per gallon) ? you may use the fact that 1 gallon=4.5 litres.