How do you know that x^2-8x+20 is always even

For any two rational numbers a and b, one and only one of the following is true: a b a=b

There are 80 new houses being built in a neighborhood. Last month, 2/5 of them were sold. This month, 3/4 of the remaining houses were sold. How many houses are left to be sold?

Brenda is cooking couscous. The recipe says she requires 480 grams of couscous for 4 people. How many will she need for 14?

85 over 100 in simplest form

Which statement is always true? A) The sum of two irrational numbers is rational. B) The product of a rational and irrational number is rational. C) The sum of two rational numbers is irrational. D) The product of two rational numbers is rational.

Luke bought three canvas boxes to store his papers. The canvas boxes have dimensions of 12 inches by 10 inches by 12 inches. What volume of items can the three canvas boxes hold?

4 rounded to the nearest tenth

The Fun Guys game rental store charges an annual fee of $15 and charges $5.50 per game rented. The Game Bank charges an annual fee of $31 and charges $3.50 per game.

Which equation has no solution? 4x + 3) + 2x6 (x + 2) 5+2 (3 2x) = x + 3 (x+1) 5 (x + 3) + x = 4 (x + 3) + 3 4 + 6 (2 + x) = 2 (3x + 8)

The annual Gross Domestic Product (GDP) of a country is the value of all of the goods and services produced in the country during a year. During the period 1985-1999, the Gross Domestic Product of the United States grew about 3.