Solve the system of equations below for a, b, and c. 2a + b - 2c = -7
6a + 3b - c = -26
4a + 2b + 2c = -20

Please answer quick!!! I appreciate ANY help

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cos of 61.6

Which problem would you use the following proportion to solve for? 24/x=40/100 a. what is 40% of 24? b. what percent is 24 of 40? c. twenty-four is 40% of what number? d. forty percent of 24 is what number?

Who can me with this algebra for your guys.