Set up a triple integral to find the mass of the solid tetrahedron bounded by the xy-plane, the yz-plane, the xz-plane, and the plane x/5+y/4+z/20=1, if the density function is given by δ(x, y,z)=x+y. write an iterated integral in the form below to find the mass of the solid.∭rf(x, y,z)dv=∫ba∫dc∫fe (x+y) dzdydxwith limits of integration

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form

a. she will receive a refund of $278.

step-by-step explanation:

answer: check all that apply, where the options?

step-by-step explanation: