Suppose you earn 7t - 1 dollars on monday and 8t + 5 dollars on tuesday. what were your total earnings? simplify your answer

If a and b are the measures of two first quadrant angles and sin a = 4/9 and sin b = 2/5 find sin(a+b).

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.