Two polynomials are added and the sum is 3x^2-y+4. For each statement, state weather it is always true, sometimes true or never true. Explain or provide a counter example to justify our answer.
a) both are monomials

b) both include a y-term

c) if there is a x-term in one polynomial, then there must be a x-term in the other

d) both are monomials

The cross-sectional areas of a right triangular prism and a right cylinder are congruent. the right triangular prism has a height of 6 units, and the right cylinder has a height of 6 units. which conclusion can be made from the given information? the volume of the triangular prism is half the volume of the cylinder. the volume of the triangular prism is twice the volume of the cylinder. the volume of the triangular prism is equal to the volume of the cylinder. the volume of the triangular prism is not equal to the volume of the cylinder.

An airplane travels at an unknown elevation before it descends 3 miles to an elevation of 15 miles. find the elevation of the plane before its descen.

y=2x−1 5x−4y=1 is (1,1)(1,1) a solution of the system?