(2x+5y)-10(z-3) Can someone tell me how to simplify this plz!?

Pls will give brainliest and all p.s u can zoom in if u cant see plss

Plot a point at the y-intercept of the following function on the provided graph. 3y=-5x+7 20 points

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?