Show that cos2x + 1 = 2cos2 x. Use the "^" key on the keyboard to indicate an exponent. For example, sin2 x would be typed as sin^2x.

Ryan has $40 in the bank. He writes a check for $64.75 and then uses his check card to buy gas for $40. What is his new balance? Show work and explain clearly

Find the perimeter of a polygon with vertices at A (0, 1), B (4, 4), C (7, 0), D (3, - 3), E (-4, - 4). Round your answer to the nearest hundredth. Group of answer choices 40.55 units 25.00 units 32.00 units 28.47 units

Which are operations in the algebra of sets?

If my pizza has 50.24 inches of crust, what is the distance across the pizza? Use 3.14 for it.

The costs for going to a god beach are $7 for 1 dog, and $2 feet each additional dog. which equation shows this situation where x > 1? Choices: y = 2x + 5 y = 3x + 11 y = 5x + 2 y = 7x + 11

A motorboat travels 448 kilometers in 8 hours going upstream and 516 kilometers in 6 hours going downstream. What is the rate of the boat in still water and what is the rate of the current?

Jack made 50% more smoothies than yesterday. If he made 30 smoothie today how many did he make yesterday?

Mr. Ramirez has enough money to fence one of his rose gardens, how many feet of fencing will he need if both gardens have the same perimeter

David saves $175 each month for the first 5 months. Then he saves $225 each month for the next 5 months. What is the average amount that David saves each month

Which of the following equations is not equivalent to the others? y = - 4 + 3 x y = - 3 x + (-4) y = - 3 x - 4 y = - 4 - 3 x