Look at this information about recycling: 20 large plastic bottles can be recycled to make 1 fleece jacket
How many fleeces can be made with 280 large plastic bottles?

14 fleeces can be made from 280 large plastic bottles.

Step-by-step explanation:

Given that:

20 large plastic bottles can be recycled to make 1 fleece jacket.

Ratio of bottles to jacket = 20:1

Number of large plastic bottles = 280

Let,

x be the number of fleece jackets.

Ratio of large bottles to fleece jackets = 280 : x

This is a proportional relationship.

20 : 1 :: 280 : x

Product of mean = Product of extreme

280 = 20x

20x = 280

Dividing both sides by 20

Hence,

14 fleeces can be made from 280 large plastic bottles.

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4

if gloria has "carry over" minutes, (that is, any minutes paid for but not used in a month can be applied to her payment for minutes in the next month,) her total usage for the three months is: total minutes = 320 + 243 + 489 = 1052 minutes number of 200 minute blocks = 1052/200 = 5 r52 (that is 5 with a remainder of 52) rounding up the number of 200 minute blocks gives her usage for the three months as 6 blocks. the cost for six blocks is 6 x $25 = $150 she also has 200 - 52 or 148 carry over minutes if gloria pays each month and unused minutes are lost, applying the rounding up procedure to each month gives: first month usage of 320 minutes rounds up to 2 blocks of 200 minutes for a payment of 2 x $25 = $50 second month usage of 243 minutes rounds up to 2 blocks of 200 minutes for a payment of 2 x $25 = $50 third month usage of 489 minutes rounds up to 3 blocks of 200 minutes for a payment of 3 x $25 = $75 total payments for the three months are $50 + $50 + $75 = $175 get the plan with carry over minutes!