In a bag of buttons, $80\%$ are brown, and the rest of the buttons are blue. The difference between the number of brown buttons and the number of blue buttons is 72 buttons. How many brown buttons are there?

Find the volume of the described solid.the solid lies between planes perpendicular to the x-axis at x = 0 and x=7. the cross sectionsperpendicular to the x-axis between these planes are squares whose bases run from the parabolay=-31x to the parabola y = 30/x.a) 441b) 147c) 864d) 882

You and a friend went to the movies.you spent half your money on tickets. then you spent 1/4 of the money on popcorn, $2 on candy, and $3 on a soda. if you have $1 left, hiw much money did u take to the movies?

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4