Can I have help and please show work

Part a : solve - vp + 40 < 65 for v . part b : solve 7w - 3r = 15 for r show your work!

50 ! pls ! 12.  building codes regulate the steepness of stairs. homes must have steps that are at least 13 inches wide for each 8 inches that they rise.

a. discuss how to find the slope of the stairs.
b. describe how changing the width or height affects the steepness of the stairs.

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?