Solve each of the following systems, if possible. Indicate whether the system has a unique solution, infinitely many solutions, or no solution. 3x+4y=-17
2x+3y=-13
Please help ASAP I'm having a hard time doing this problem. I can either use substitution or elimination in this problem.

Evaluate-27 ^4/3/8 a) - 81/16 b) 81/16 c) 16/81

If i have 20$ and i gave 5$ away how much i got

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.