(49 + x)/4 *can you tell me how you got the answer?

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

The stem-and-leaf plot shows the heights in centimeters of teddy bear sunflowers grown in two different types of soil. soil a soil b 5 9 5 2 1 1 6 3 9 5 1 0 7 0 2 3 6 7 8 2 1 8 3 0 9 key: 9|6 means 69 key: 5|8 means 58 calculate the mean of each data set. calculate the mean absolute deviation (mad) of each data set. which set is more variable? how do you know?

Through which points should a line of rotation be placed to create a cylinder with a radius of 3 units