Two triangles are joined, as shown, to form a trapezium. The largest angle of the trapezium is 140°.
Write two equations.
Solve them to find the value of a and the value of b.

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

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

Type the correct answer in each box, round your answers to the nearest integer 20 25 30 in the figure, the perimeter of hexagon abcdef is approximately w units, and its area is square units