Question

Question #c5d4c

Answer 1

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