Correct! lines that have undefined slopes are always parallel to the y-axis as the change in x is 0. A gradient is calculated by the change in y divided by the change in x and anything divided by 0 is referred to as undefined.

(calculation for a gradient)
Hope that helps sorry if its a bit confusing :)
Answer:
working together, they can paint the room in 4 hrs 14 min
Step-by-step explanation:
Multiply both sides by 72x
8x+%2B+9x+=+72
17x+=+72
x+=+4.24 hrs
.24%2A60+=+14.4
working together, they can paint the room in 4 hrs 14 min
Answer:
8.75%
Step-by-step explanation:
the difference
=$137.62-$126.55
=$11.07
the percent of tax
=$11.07/$126.55×100%
=8.7475306%
=8.75%
Here, this should work, sorry if i'm incorrect
Forumula? - (<span>1/2)</span><span>h(a + b)l
B Is base Length
A is the side face
Sorry if im confusing, you can also go use google</span>
Figures with faces that are polygons are called "Polyhedrons"