1. Questions 1 to 4: Divide. Make sure your answers are in simplest form.
2/3 divided by 5/9
option1. 1 4/5
option2. 1 1/5
option3. 1 3/15
option4. 1 3/5
2. c/2d divided by d/8c
option1. 4c2/d^2
option2. 4c^2/3d
option3: 2c/d^2
option4: 2c^2/d^2
3. 2x-y/2y-x divided by 4x^2-y^2/4y^2-x^2
option1: 2y-x/2x+y
option2: 2y+x/2x+y
option3:2y+x/2x-y
option4:2y-x/2x-y
2007-12-27 05:45:48 · 5 answers · asked by Jackie 2 in Science & Mathematics ➔ Mathematics
OK
2/3 divided by 5/9 ; is you multiply the top and bottom by 9/5 the denominator cancels out!
2/3 * 9/5 /(5/9)(9/5) = 2/3 * 9/5
= 6/5 = 1 1/5 (Option 2)
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c/2d divided by d/8c ; use same principal
c/2d * 8c/d = 4c^2 /d^2 (Option 1 - s/b ^2)
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2x-y/2y-x divided by 4x^2-y^2/4y^2-x^2
(2x-y/2y-x) / [(2x-y)(2x+y) / (2y-x)(2y+x)]
(2x-y/2y-x) *(2y-x)(2y+x)/(2x-y)(2x+y)
2x-y * 2y+x/(2x-y)(2x+y)
2y+x / 2x+y (Option 2)
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Hope that helps.
2007-12-27 06:00:38 · answer #1 · answered by pyz01 7 · 0⤊ 1⤋
when u divide by a fraction, flip it over and multiply. for example, the first problem.
2/3 divided by 5/9 is the same as 2/3 times 9/5 so u get 18/15 which is the same as 6/5 which is 1 1/5
hope that helps
2007-12-27 13:50:27 · answer #2 · answered by Just M 2 · 1⤊ 1⤋
Just remember that dividing by a/b is the same as multiplying by b/a.
2/3 ÷ 5/9 = 2/3 à 9/5 You can finish this.
2007-12-27 13:48:50 · answer #3 · answered by DWRead 7 · 1⤊ 1⤋
answer to the first one is option2, answer to second one is option 1, and i really cant figure out the last one but when ur dividning fractions flip the second fraction and multyiply the two...for example if u are supposed to divide 1/2 by 2/3 u would do 1/2*3/2 to get ur answer. hope i helped...
2007-12-27 14:01:44 · answer #4 · answered by ellsmell13 2 · 0⤊ 1⤋
2. c/2d * 8c/d = 4c62/d^2
3. (2x-y)/(2y-x) * (4y^2-x^2)/(4x^2-y^2)
= (2x-y)/(2y-x) * (2y+x)(2y-x)/(2x+y)(2x-y)
= (2y+x)/(2x+y)
2007-12-27 13:54:48 · answer #5 · answered by norman 7 · 0⤊ 1⤋