Use an addition or subtraction formula to find the exact value of the expression, as demonstrated in example 1. cos 41π 12.

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex

Heather is a cashier. she can ring up 1212 customers in 99 minutes. at this rate, how many minutes does it take her to ring up 44 customers?