A parallelogram is transformed according to the rule (x, y) — (x, y). Which is another way to state the transformation?

Find the balance at the end of 4 years if 1000 is deposited at the rate of

Prove that the sum of two consecutive exponents of the number 5 is divisible by 30.if two consecutive exponents are 5n and 5n + 1, then their sum can be written as 30.

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.