If you flip a fair coin 6 times, what is the probability that you will get exactly 4 tails

Write an equation in point-slope form for the line through the given point that has the given slope (-2,-7); m=-3/2

Sioux co. replaced the roof on its existing building, therefore increasing the building's life by 10 years. the cost of the roof is considered a(n):

Why can't my rank go i have 1723 points, but my rank is only at ambitious, which is only 250 points! like, (p.s. i know this isn't related to math, but i just don't know why it's doing this and i would really appreciate if someone could tell me whats going on with this)