1. The office mart purchased a supply of mechanical pencils and ball-point pens. The ratio of pencils to pens was 5:9. The pencils cost $1 each, the pens cost 25 cent each, and the total bill was $290. How many pencils were purchased?
2. The beacj hut purchased a supply of sunglasses and visors. The ratio of sunglasses to visors was 7:4. Each pair of sunglasses cost $6.00, each visor cost $4.50, and the total bill was $720. How many pairs of sunglasses were purchased?
Please help !!!! I'm sooo desperate !!! Show works or do anything to explain. Thanks alot !
1. 5(1)+9(.25)=7.25 Was bought in that ratio. So take the total bill divided by 7.25.
290/7.25=40.
So 40 sets were purchased. 5 pencils per set.
40x5=200
2. 7(6)+4(4.5)=60
720/60=12
12x7=72
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