Estimate 874,238 – 228,759 using front-end estimation. (please help it counts as a test worth 50% of my grade) (I will give brainliest)

Billy plotted −3 4 and −1 4 on a number line to determine that −3 4 is smaller than −1 4 is he correct? explain why or why not?

Marina baked cookies. she gave 3/4 of the cookies to the scout bake sale. she shared the remaining 6 cookies with her friends. how many cookies did marina bake?

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?