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1.A locomotive is 56 ft long and 11 ft wide. a special effects designer makes a model thst is 18 in.long. how wide should be?

2.The screaming equals team color is made b mixing red woth blue piant in a ratio of 12 to 7. how much blue piant should be mixed with 4 galons of red.

3.the ratio of hight of the tv is 9 to 16. how high is a screen that is 30 in wide.

2006-12-11 10:31:07 · 8 answers · asked by Anonymous in Science & Mathematics Mathematics

8 answers

1. Use proportions.
56/11=18/x
56x=198
x=99/28 or approx. 3.5 inches.

2. 12/7=4/x
12x=28
x=7/3 or approx. 2.3 gallons of blue paint

3. 9/16=x/30
16x=270
x=135/8 or approx. 16.9 inches high.

2006-12-11 10:37:20 · answer #1 · answered by anonymousperson 4 · 1 0

using proportions
18:56=x:11
product of extremes=product of means
56x=18*11
x=18*11/56
=198/56
=3 30/56 foot

2.red:blue=12:7
so 12:7=4:x
12x=28
so x=28/12
=2 4/12
=2 1/3 gallons

3.height to width ratio=9:16
so 9:16=x:30
16x=9*30
x=9*30/16
=270/16
=16 14/16
=16 7/8 inch

2006-12-11 10:39:36 · answer #2 · answered by raj 7 · 0 0

the math goes like this for 1.
56 x 12 and 11 x 12 switches feet to inches

so 672 inches long and 132 wide

so if you create an equation like this:

132/672=x/18
132*18=2376 then divide 672

so 3.5 inches wide (thats rounded to the nearest .5)

Number 2 is simple, 7/12=x/4
so 28/12=2 1/3 gallons of red
or 2.33 gallons of red in decimals

2006-12-11 10:40:45 · answer #3 · answered by bheithcao 2 · 0 0

These are questions using ratios.
1. Put length/width ----Let the unknown width be w

56/11= 18/w

Cross multiply 56x w = 11x18

to get w by itself, divide both sides by 56

56xw/56=11x18/56

w = figure out the answer yourself. Use your calcultor.

2... same kind of think put red/blue

let b be gals of blue paint

12/7= 4/b

cross multiply 12x b = 7 x 4
finish off the same as before. (you will have to divide both sides by 12, remember)

3 this is the same type. Try to do it yourself. You can always come back online if you get stuck.

2006-12-11 10:43:49 · answer #4 · answered by louel53 3 · 0 0

1: 56/11=1.5/X or 56X=16.5 or X=16.5/56
0.295 feet or 3.54 inches.

2: 12/7=4/X or 28=12X or X=2.3 gallons

3: 9/16=X/30 or 16X=270 or X=16.875 inches

2006-12-11 11:08:45 · answer #5 · answered by LeAnne 7 · 0 0

1. 3 and a half inches

2. 2 and a third gallons

3. 16.875 inches

Just hope your teacher doesn ask you to explain how you worked out the answers . . .

2006-12-11 10:37:42 · answer #6 · answered by poptop 3 · 0 0

1.56ft/11ft=672in/132in, 672/132=18/x, 2376=672x
x=3.54in

2.12/7=b/4, 48=7b
b=6.86 gallons

3.9/16=h/30, 270=16h
h=16.88in

2006-12-11 10:43:10 · answer #7 · answered by One With No Name 2 · 0 0

Obviously he still likes you..and he didn't really want to hang out with your brother, he wanted to see you..Maybe it was their plan so he could come over and see you. But you shouldnt have given him the cold shoulder when he came over because now he probably thinks you aren't interested in him anymore. So talk to him about it, tell him you didn't mean to act like that

2016-03-13 05:50:35 · answer #8 · answered by Anonymous · 0 0

Are you cheating, Mr. "Only A Kid"?

And yer not "only a kid." Think more of yourself. Being a kid is great. :)

2006-12-11 10:33:20 · answer #9 · answered by Amsterdam 2 · 0 0

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