Type the correct answer in each box. consider the expressions shown below.
a -9x^2-2x+7
b 9x^2-2x+2
c 9x^2+2x-7

complete the following statements with the letter that represents the expression.

(7x^2-5x+3)+(2x^2+3x-1) is equivalent to .

(3x^2-4x-4)+(-12x^2+2x+11) is equivalent to .

(4x^2-3x-9)+(5x^2+5x+2) is equivalent to expression .

Which description is represented by a discrete graph? kiley bought a platter for $19 and several matching bowls that were $8 each. what is the total cost before tax? the temperature at 9 a.m. was 83° f and is heating up at an average rate of 6°f per hour. what is the temperature x hours later? juan ate an egg with 78 calories and some cereal with 110 calories per serving for breakfast. what is the total amount of calories he consumed? a bottle contained 2,000 ml of liquid and is being poured out at an average rate of 300 ml per second. how much liquid is left in the bottle after x seconds?