In a collection of nickels, dimes, and quarters the value of the collection is $12.85. If the number of nickels is 6 less than twice the number of dimes and the number of quarters is 5 more than twice the number of dimes, how many quarters are there?

Write a polynomial that fits the description: a third-degree polynomial with leading coefficient -4

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

Need so much on this one how many yards?