What number should be added to the expression x2+2x to change it into a perfect square trinomial?

A) 1

B) 2

C) 4

D) 9

Mrs. Ling is having an end of the year party for her students. 5/8 of her students want a pizza party, while 3/8 want an ice cream party. If there are 23 students in Mrs.

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A chemist has 200 mL of a 10% sucrose solution. She adds x mL of a 40% sucrose solution. The percent concentration, y, of the final mixture is given by the rational function: The chemist needs the concentration of the final mixture to be 30%.

What is the solution to this system of equations? x+2y=4 2x-2y = 5 (3 - 5 1 2 3 no solution infinitely many solutions

A bag contains 5 white balls and 4 black balls, in how many ways 2 balls be drawn?

How many solutions exist for the given equation? 0.75 (x + 40) = 0.35 (x + 20) + 0.35 (x + 20)

What transformations preserve measure of side lengths and angles.

The cost C in dollars ($) for a canoe rental for h (hours) is given by C = 4.50h + 10 Nick spends $39.25 How many hours did he rent the canoe?

Which rule explains why these triangles are congruent? A. SAS B. ASA C. AAS D. These triangles can not be proven to be congruent.

The aquarium has 30 times as many fish in one tank as jacob had. the aquarium has 90 fish. how many fish does jacob have