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3 years ago

How do i cross multiply rational equations? EX: 6/x = 4/3

Mathematics

2 answers:

aliya0001 [1]3 years ago

3 0

You would multiply 6 by 3 and x by 4. You would end up getting 4x = 18 and then you simplify that to get 9/2 or 4.5.

____ [38]3 years ago

3 0

Here is a pic for you. I hope this helps!!!!!!!!!

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Suppose a box of Cracker Jacks contains one of 5 toy prizes: a small rubber ball, a whistle, a Captain America decoder ring, a r

lakkis [162]

Answer:

11.42 boxes

Step-by-step explanation:

For the first box bought, there is a 100% chance of getting a unique toy (since you still don't have any). E₁ = 1.

After that, there is a 4 in 5 chance of getting a unique toy from the next box, the expected number of boxes required is:

$E_2 = (\frac{4}{5})^{-1} = 1.25$

For the next unique toy, there is now a 3 in 5 chance of getting it:

$E_3 = (\frac{3}{5})^{-1} = 1.67$

Following that logic, there is a 2 in 5 chance of getting the 4th unique toy:

$E_4 = (\frac{2}{5})^{-1} = 2.5$

Finally, there is a 1 in 5 chance to get the last unique toy:

$E_5 = (\frac{1}{5})^{-1} = 5$

The expected number of boxes to obtain a full set is:

$E=E_1+E_2+E_3+E_4+E_5\\E=1+1.25+1.67+2.5+5\\E=11.42\ boxes$

5 0

3 years ago

Solve for r 1/2r-3=3(4-3/2

devlian [24]

1/2r - 3 = 3(4-3/2) -----> Simplify the right side.
1/2r - 3 = 3(1/2) -----> Multiply
1/2r - 3 = 3/2 ----> Add 3 to both sides
1/2r = 6/2 + 3/2
1/2r = 9/2 -----> Divide both sides by 1/2 which is the same as multiplying my 2
r = 18/2
r = 9
Hope this helps!

8 0

3 years ago

-6x^2-5x-5= −6x 2 −5x−5= \,\,-4x^2 −4x 2

aev [14]

Answer:

what is the question? it's not clear

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3 years ago

Write the percent as a decimal. Use a model to check your answer ( 6%)

bazaltina [42]

Answer:

0.06

Step-by-step explanation:

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2 years ago

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Am nevoie de ajutor la exercitiile incercuite. Dau coroana. Multumesc anticipat!

Gnom [1K]

Answer:

I am 1 year boy i dont know

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3 years ago