Please help :) thank you!

1-for what value of x is line a parallel to line b 2-for what value of x is line a parallel to line b

Which type of graph would allow us to quickly see how many students between 100 and 200 students were treated?

Asunflower was 20 1/2 inches tall. over the next 6 months, it grew to a height of 37 inches tall. what was the average yearly growth rate of the height of the plzzz write a proportion i will give you 100 points