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GarryVolchara [31]
3 years ago
15

Josephine has nine chemistry books, three history books, and eight statistics books. She wants to choose one book of each type t

o study. In how many ways can she choose the three books?
Mathematics
1 answer:
ikadub [295]3 years ago
7 0

Answer:

20

Step-by-step explanation: add them all together

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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

-47x = -10136

x = -10136/-47

x = 215.7

x ≈ 216 cookies

8 0
3 years ago
Last math question. 6th grade math
Karolina [17]

Answer:

The bag contains fewer than 10 carrots.

Catherine biked farther than 10 miles.

The chair is shorter than 20 inches.

Carlos scored over 20 points.

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2 years ago
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(x + 4)2 – 3(x + 4) – 3 = 0 Select the solution(s) of the original equation.
Aneli [31]

Answer:

x=−7

Step-by-step explanation:

(x+4)(2)−3(x+4)−3=0

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2x+8+−3x+−12+−3=0

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−x+−7=0

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Given the parent function p(x) = cos x, which
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Step-by-step explanation:

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Solve the right triangle
IgorLugansk [536]

Answer:

36.1

Step-by-step explanation:

53.9 + 36.1 = 90

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3 years ago
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