40 = -5 ×

First, simplify 5 ×

to

/ Your problem should look like: 40 =
Second, multiply both sides by 8. / Your problem should look like: 320 = -5n
Third, divide both sides by -5. / Your problem should look like:

= n
Fourth, simplify

to

/ Your problem should look like:

= n
Fifth, simplify

to 64. / Your problem should look like: -64 = n
Sixth, switch sides. / Your problem should look like: n = -64
Answer:
n = -64
Assuming you want to find the length of the longest line segment, you would have to first determine where the longest line segment is.
If you can't do this straight away, then it'd be good to draw a diagram as I shown below, to visualise.
From there, you apply pythagora's theorem to the dimensions of the rectangular prism to find the length of the longest line segment.
I have attached the solution in a photo, including some explanation. Hope it helps :)
4 40
5 50
6 60
7 70
8 80
9 90
10 100
11 110
12 120
13 130
14 140
15 150
16 160
17 170
18 180
Answer:
error
Step-by-step explanation:
error
24/55 is the answer
You can either use a calculator on your phone or computer