Ineed with this in step by step 7+3x-12x=3x+1

Find the slope of a line given the following two points

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

Olga used 100 ounces of flour to make 225 muffins. how many ounces of flour will be used to make 300 muffins?