30. Find the value of expression 20m2 + 30m + 40 when a)m = -3 b)m= - 4 c) m = 3​

Solve by any method (graphing, substitution or linear combination)y = x - 82x + 3y = 1a) (2, -6)b) (5, -3)c) (4, -4)d) (0, -8)i figured it out. the answer is (5, -3)

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

The graph shows the distance kerri drives on a trip. what is kerri's speed?