Prove that for any natural value of n the value of the expression:

(5n+1) ^2 - (2n-1) ^2 is divisible by 7

An airplane is flying at an elevation of 1500 feet. What is the airplane's angle of elevation from the runway when it is 5000 feet from the runway? Round to the nearest tenth.

Find the volume of the square pyramid and round to the nearest tenth, if necessary. 12.8 mm 13 mm

Which is true about the tides? A. Between high tides, there is a low tide. B. There are three high tides each day. C. Tides are caused by the changing of seasons. D. High tide is when the ocean water level is the lowest.

Lisa is traveling down the highway at 70 miles per hour. Which expression shows the distance she will have traveled after h hours?

Does the sum of two negative integers always negative

Luis wants to buy a home priced at $315,000. He plans to finance this amount less the down payment required. His mortgage payment would then be $2100. Luis has an annual income of $91,500 and $65,000 in savings.

Which transformation causes the described change in the graph of the function y = cos x? A. The transformation results in a horizontal shrink. B. The transformation results in a vertical stretch. C. The transformation results in a horizontal stretch.

George Anderson has $30,000 of twenty-payment life. If he is thirty-six years old, what premiums will he pay?

2/3x + 1/6 = - 3x + 4

Lucy needs 3/4 of a bucket of paint for every 4 doors she paints. how much does she need for 8 doors.