Grade 9 - Bonus question

Today we did Mathematical modeling with graphs. Working with your assigned partner you were to complete Pg. 292 #1,2,3 and then use this method to solve "Another pecan-peanut problem" and "Candy Problem" on pg. 282.
for homework.
Complete #17,18,19(bonus**!!!)pg. 299
You must have #17,18 complete in order for 19 to count as bonus. Do not forget FULL solutions.
Good luck. Have a great weekend!!
Mrs. Gascho