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Answers and Explanations'); parent.frames[0].document.write('

The problems you missed are listed below with answers and explanations.  Look over the explanation for each problem so you can understand why you missed it!

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'); resetdisplay(); for(var i = 0; i <10; i++) { ganswer[i] = prompt(question[i],""); if (ganswer[i] == "quit" || ganswer[i] == "QUIT" || ganswer[i] == "Quit") { break; } q++; if (ganswer[i] == answer[i]) { c++; } else { rightans[i] = 0; w++; } resetdisplay(); } for(var i = 0; i < 10; i++) { if (rightans[i] == 0) { expl = expl + explain[i]; } } parent.frames[0].document.write(expl); parent.frames[0].document.write(""); } question[0] = 'Find m: 5/m = 5/2'; question[1] = 'There are 13 green computers for every 12 purple ones. How many purple computers are there in a group of 200 computers?'; question[2] = 'Find m: 14/m = 8/2'; question[3] = 'Find m: 7/2m = 1/2'; question[4] = 'Find m: 14/m = 7'; question[5] = 'There are 5 red marbles for every 25 blue ones. How many red marbles are there in a group of 600 marbles?'; question[6] = 'Find m: 26/m = 5/8'; question[7] = 'Find m: 96/m = 2/3'; question[8] = 'Find m: 58/m = 3/1'; question[9] = 'There are 3 yellow kites for every 7 silver ones. How many silver kites are there in a group of 10?'; answer[0] = '2'; answer[1] = '96'; answer[2] = '7/2'; answer[3] = '7'; answer[4] = '2'; answer[5] = '100'; answer[6] = '208/5'; answer[7] = '144'; answer[8] = '58/3'; answer[9] = '7'; explain[0] = '#1

5/m = 5/2

Cross multiply.

5m = 10

Divide each side by 5.

m = 2

'; explain[1] = '#2

There are 13 green computers for every 12 purple ones. How many purple computers are there in a group of 200 computers?

Write down the information given and inferred.

g = 13
p = 12
t = 25

With this information, there are three different proportions you can write.

g/p = 13/12
p/t = 12/25
g/t = 13/25

The problem asks about purple computers and total computers, so we will use the second proportion and replace the variable T with 200.

p/200 = 12/25

Cross multiply.

25p = 2400

Divide both sides by 25.

p = 96

There are 96 purple computers in a group of 200 computers.

'; explain[2] = '#3

14/m = 8/2

Cross multiply.

8m = 28

Divide each side by 8

m = 7/2

'; explain[3] = '#4

7/2m = 1/2

Cross multiply.

2m = 14

Divide each side by 2.

m = 7

'; explain[4] = '#5

14/m = 7

Convert 7 to fraction form.

14/m = 7/1

Cross multiply.

7m = 14

Divide each side by 7.

m = 2

'; explain[5] = '#6

There are 5 red marbles for every 25 blue ones. How many red marbles are there in a group of 600 marbles?

Write down the information both given and inferred.

r = 5
b = 25
t = 30

With this information, there are three different proportions you can write.

r/b = 5/25
r/t = 5/30
b/t = 25/30

The problem asks about red marbles and total marbles, so we will use the 2nd proportion and replace the variable t with 600

r/600 = 5/30

Cross multiply.

30r = 3000

Divide both sides by 30.

r = 100There are 100 red marbles in a group of 600.

'; explain[6] = '#7

26/m = 5/8

Cross multiply.

5m = 208

Divide both sides by 5.

m = 208/5

'; explain[7] = '#8

96/m = 2/3

Cross multiply.

2m = 288

Divide both sides by 2.

m = 144

'; explain[8] = '#9

58/m = 3/1

Cross multiply.

m = 58/3

'; explain[9] = '#10

There are 3 yellow kites for every 7 silver ones. How many silver kites are there in a group of 10?

Write down the information both given and inferred.

y = 3
s = 7
t = 10

From this information we could write down three different proportions, but if you notice the total is already 10 which is what we are looking for. So instead we can just go back and look at our information and find out that in a group of 10 there are 7 silver kites.

'; rightans[0] = 1; rightans[1] = 1; rightans[2] = 1; rightans[3] = 1; rightans[4] = 1; rightans[5] = 1; rightans[6] = 1; rightans[7] = 1; rightans[8] = 1; rightans[9] = 1; //-->