Ricardo took the following steps to simplify the expression below but was surprised to hear that his answer was incorrect. Which of the following best describes Ricardo's mistake?
2x + 3x(x-3)-4
5x(x-3) -4
5x2 - 15x -4
A. Ricardo distributed incorrectly
B. Ricardo multiplied monomials incorrectly.
C. Ricardo added before multiplying.
D. Ricardo multiplied before adding,

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?