Question #c5d4c

1 Answer
Oct 27, 2017

Answer:

You got a and b right, so let's move on

Explanation:

c) Cost of the pencils=price times number: #.25(x+10)#

d) Total cost is #.50x+.25(x+10)=.50x+.25x+2.50#

The inequality is:
#.75x+2.50<5.00#

Subtract #2.50# from both sides:
#.75x<2.50#

Divide both sides by #.75#:
#x<3.33#

Since #x# must be whole, this translates to #x<=3#

Answer: at most she bought 3 pens and 13 pencils.

Check:
#.50*3+.25*13=4.75# this will do
#.50*4+.25*14=5.50# this is too expensive