Right answer will get brainlist

Use the graph of the sine function y=2sinθ shown below

50 will mark show all use the linear combination method to solve the system of equations. explain each step of your solution. if steps are not explained, you will not receive credit for that step. 2x+9y= -26 -3x-7y=13

What is 4 square root 7^3 in exponential form?