Priya is simplifying the expression 2(4-2.0)-3-2.7. Here is her work:
2(4-21)-3-2.1
8 -- 2.23-22
- 11-4.2
a. Priya's work is incorrect. Explain the error she made.
b. Write an expression equivalent to - 4(2+ 3) -12.3 – 5 that only has two terms.

I really only need B.

Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b.you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c.you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d.you spend $5 plus $10 per week until you have less than $45.

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)