Evaluate the geometric series:

a1 = -1, r = 2, n = 7

Prove that sin x cos x = cot x is not a trigonometric identity by producing a counterexample.

A social psychologist wants to know whether students' performance on a problem solving task is lowered by having other people look on when completing the task.

Aidan bought x movie tickets for $10.00 each and y y bags of popcorn for $4.50 each. Write an algebraic expression for the total amount Aidan spent.

Which ordered pair is the solution to the system of equations? {y=2x-154x+3y=-5 (5, - 5) (4, - 7) (0, 6) (7, - 11)

If f (x) = 2x+8 and g (x) = x^4, what is (g°f) (-3) ?

5. How many different codes can a combination lock have if there are three numbers on the lock and each number can be from 0-9?

Solve this equation 10.5z = 5z A. z = - 0.5 B. z = 15.5 C. z = 2.1 D. z = 5

Student loans in 2010 was $25,250 per student. If the interest rate for student loans increases to 6.8%, estimate how much more students will pay over a 10-year repayment period for this "average amount owed" as compared with 3.4%. $ more

Larry used a pattern of colors to make a cube train. he used a red cube, blue cube a red cube and another red cube. before he started the pattern again how many red cubes did Larry use?

What is the value of 4 (3x+5) when x=11