Brainiest i suck at middle school math meh! (08.03/08.05 mc)

a pair of equations is shown below:

y = 7x − 8
y = 5x − 2

part a: explain how you will solve the pair of equations by substitution or elimination. show all the steps and write the solution. (5 points)

part b: if the two equations are graphed, at what point will the lines representing the two equations intersect? explain your answer. (5 points)

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

Place the following steps in order to complete the square and solve the quadratic equation,

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)