Which system of equations below has exactly one solution? O y=-8x - 6 and y = -8x + 6

y=-8x - 6 and 7y = -4x - 3
O y=-8x – 6 and y = 8x - 6
O y=-8x – 6 and -y = 8x + 6

Find the balance at the end of 4 years if 1000 is deposited at the rate of

Which represents the solution set of the inequality 5x-9 < 21? a. x < 12/5 b. x > 12/5 c. x > 6 d. x < 6

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?