What could you do to the equation 100x + 300 = 500 to change it into x + 3 = 5?

Identify an equation in point slope form for the line perpendicular to y=3x+5 that passes through (4,-1)

Jude is making cement for a driveway. the instructions show the amount of each ingredient to make 1 batch of cement. complete each statement to adjust the ingredients for each new situation if jude uses these instructions.

Can someone me with my math problems i have a bunch. i will give brainliest and lots of pleeeaaasssee