If a seed is planted, it has a 80% chance of growing into a healthy plant. if 9 seeds are planted, what is the probability that exactly 4 don't grow?

What expression is equivalent to (2x-1)(x-3)?

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items