i really need your help fast

Question

using 1 inch = 15 ft as the scale factor what are the blueprint demisions of a room in a model house that is actually 30ft x 45ft?

 

 

 

a bag contains 10 white golf balls and 6 striped golf balls. a glofer wants to add 112 golf ball to the bag . he wants the ratio of striped golf balls to remain the same how many of each should he add?

Answer 1

 

Seeing that you don't understand the solution to the second problem you can solve it with arithmetic because the numbers are small.

The ratio of white to striped is 10 to 6 which means for every 10 white balls there are 6 striped balls.

You want to add 112 balls.

white          striped

 

10                6      16 total

20                12    32 total

30                18    48 total

40                24    64 total

50                30    80 total

60                36    96 total

70                42    112 total (all done)

 

Answer 2

For the first problem, set up proportions:

1 inch / 15 ft = x inches / 30 ft

1 inch / 15 ft = y inches / 45 ft

 

You can cross multiply to solve.

 

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For the second problem, you have a ratio of 10:6 white:striped golf balls in groups of 10+6=16 golf balls.

112/16 = 7, so he needs to add 7 more groups. Each group has 10 white and 6 striped. How many are added total of each?