Question

Wei has $150.00 to make a garland using 60-cent balloons. He wants to purchase 100 blue balloons and some number of white balloons. He learns that the white balloons are on sale for half price. He writes and solves an equation to find the number of white balloons he can purchase.
Which models can be used to solve the problem?
100b + w = 150; 6,000 + w = 150
100b + w = 150; 100b + 30 = 150
0.60b + 0.30w = 150; 60 + 0.30w = 150
0.60b + 0.30w = 150; 100 + 0.30w = 150

Answer 1

Answer:

c

Step-by-step explanation:

Answer 2

100 blue balloons. Cost  = 60 cents = $0.60
cost of blue balloons = 100*0.60 = $6

Cost of white would be for half price, $0.6/2 = $0.30
Let x be the number of white balloons
cost of white balloons = 0.3*x = 0.3x

Total cost = $150

cost of white balloons + cost of blue balloons = $150

0.3x + 6 = 150            so this model of equation solves it. 

Can we just go ahead and solve it?

0.3x = 150 - 6

0.3x = 144

x = 144/0.3

x = 480

So he could buy 480 wh