Question

Nestle Crunches cost 30 cents and Snickers cost 50 cents. Jessica and Tori

treated the class and they spent $6.80. How many students had Snickers if these
numbered 4 less than those who had Nestle Crunches?

Answer 1

• Nestle crunches be x
• Snickers be y

Equations are

• 0.30x+0.50y=6.80=>30x+50y=680--(1)
• x=4+y=>x-y=4-(2)[/tex]

EQUATION(2)× 30

`\\ \sf\longmapsto 30x-30y=120--(3)`

Subtracting (1) and (3)

`\\ \sf\longmapsto 80y=560`

`\\ \sf\longmapsto y=7`

Answer 2

• 7 students had Snickers

Explanation:

• Nestle Crunches - n
• Snickers - s

System of equations according to given:

• 30n + 50s = 680 (converted $6.80 into 680¢)
• n = s + 4

Substitute n into first equation and solve for s:

• 30(s + 4) + 50s = 680
• 30s + 120 + 50s = 680
• 80s = 680 - 120
• 80s = 560
• s = 560/80
• s = 7