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Richard R. for tutoring lessons in South Jordan UT WyzAnt Tutoring Tutor Tutor United States

Richard R.

Math Tutor - College Instructor w/Eng & Instruc Design degrees

South Jordan, UT (84095)

Travel Radius 20 miles
Hourly Fee $25.00
Discount $21.25 - $23.75 Save up to 15% (i)
  5 ratings

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Richard's Responses in WyzAnt Answers

8 3/5 divide by 3 1/2 =

43/ 5      7/2  and where do I go from here?

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Asked by Gwen from Bangor, ME
00

Richard's Answer:

First, invert (get the reciprocal of ) 7/2 to get 2/7.  Then multiply 43/5 times 2/7.

With the multiplication of fractions, you multiply all of the numerator number and multiply all the denominator numbers.

so multiply 43 times 2 for the numerator, = 86

multiply 5 times 7 for the denominator, = 35

so you get 86/35.  They will want the answer in mixed number format, because that's the form the original numbers were in.  So you should convert 86/35 to 2 and 16/35.

SAT Prep Ratio Word Problem

The eggs in a certain basket are either white or brown. If the ratio of the number of white eggs to the number of brown eggs is 2/3, each of the following could be the number of eggs in the basket EXCEPT...:

a) 10

b)12

c)15

d)30

e)60

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Asked by Annie from Estill, SC
00

Richard's Answer:

The key to understanding this and solving it is to not get trapped into thinking that you just need to multiply the optional answers by 2/3 and see that generates a number with a fractional remainder.

If there are 2 white eggs to every 3 brown, then view the color proportions as fraction of 5.  In the case of whites, there are 2 out of 5; with brown, there are 3 out of 5.  To maintain that ratio with larger overall number of eggs, the total number of eggs needs to be a multiple of 5.  The number 12 is the only one that fits that.

Hope that helps.  Essentially, another way to say what Crystal has said.  Nice job Crystal.

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