Ou know Part B

Miguel selects five DVDs to purchase. A few of the DVD cases appear to be

damaged, so the manager gives Miguel a 20% discount on his entire purchase.

Miguel tries to guess how much money will be deducted from the total cost.

What is a reasonable estimate of the cost of the DVDs before tax is added?

What is the actual cost before tax?

The cost is 5 for 37.50

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this

b. y = 4x - 2

step-by-step explanation:

to find a parallel equation to an equation, make sure both equations have the same slope but different y-intercepts.

y = 4x + 1

4 = slope

1 = y-intercept

y = 4x - 2

4 = slope

-2 = y-intercept

they both have the same slope but different y-intercepts, so, b. is the correct answer.

and to check your work, you can graph both equations. : )