Are the following polynomials?:

-x^2+5x

6x^2+5x

-7x^2+5/3x

Marna thinks that about 35% of her mail is junk mail. She gets about twice as much regular mail as junk mail. Is she correct?

Which number (s) below represent a repeating decimal? -2/5, - 7,3/9,11/12

A cube has a volume of 343 cm3. What is the length of each side of the cube?

A perfect square trinomial is in the form of ax2 + 2ab + b2 or ax2 - 2ab + b2 Which expressions fit the pattern of a perfect square trinomial?

If Denver, CO is 437 miles from Albuquerque, NM, and Salt Lake City, UT is 20% further from Denver, Co than Albuquerque, NM, how far is Salt Lake City, UT from Denver, CO?

Two friends leave their houses at the same time and run across town towards each other. The first friend runs at a speed of 8 miles per hour. The second friend runs at a speed of 7 miles per hour. If they left at 6 p. m.

Of the three digit integers greater than 700, how many have two digits that are equal to each other and the remaining digit different from the other two? A) 90 B) 82 C) 80 D) 45 E) 36

You want to deposit 12000 in a bank at an interest rate of 8 percent per year. What is the future value of this money after five years

The quotient of eight raised to the power of two and four, decreased by six."

What is the vertex of the function y = 2x^2-5x*12