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klio [65]
3 years ago
12

Mary owes her mom $4.50. She borrows $2.17 more from her mom. Which expression shows how to determine the amount, in dollars, Ma

ry owes her mom?
Mathematics
2 answers:
Tcecarenko [31]3 years ago
8 0

Answer:

4.50+ 2.17

Step-by-step explanation:

You can also filp the expression if needed. Hope this helps :)

HACTEHA [7]3 years ago
7 0

Answer:

The answer is 4.50+2.17=6.67, which is the amount she owes her mother. Hope this helps!

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Answer:

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3 years ago
In the American version of the Game Roulette, a wheel has 18 black slots, 18 red slots and 2 green slots. All slots are the same
m_a_m_a [10]

Answer:

-$0.26

Step-by-step explanation:

Calculation to determine the expected value of playing the game once

Expected value= [18/(18+18+2) x $5)]- [20/(18+18+2) x $5]

Expected value= ($18/38 x $5) - (20/38 x $5)

Expected value= ($2.37-$2.63)

Expected value= -$0.26

Therefore the expected value of playing the game once is -$0.26

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2 years ago
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3 years ago
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6 0
3 years ago
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Weiming, Joyce and Siti divide cookies to sell in a ratio of 5: 12: 9. After Weiming sold 28 cookies, the ratio becomes 1: 8: 6.
Strike441 [17]

Answer:

216 cookies

Step-by-step explanation:

From the question,

Let the total cookies in the first place be x cookies.

Their ratio = 5:12:9

Total  = 5+12+9 = 26.

Weiming share = (5/26)x = 5x/26

If weiming sold 28 cookies

⇒ (5x/26)-28

⇒ (5x-728)/28

Hence Weiming new share = (5x-728)/28 cookies

The new ratio is 1:8:6

The total cookies becomes = x-28

Therefore,

(1/15)(x-28) = (5x-728)/28

(x-28)/15 = (5x-728)/28

Crossmultiply

28(x-28) = 15(5x-728)

28x-784 = 75x-10920

Collect like terms

28x-75x = -10920+784

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x = -10136/-47

x = 215.7

x ≈ 216 cookies

8 0
3 years ago
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