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stiv31 [10]
3 years ago
9

A bag contains 144 marbles. Some are red and the rest are black.There are 11 red marbles for every black marble.How many red mar

bles are in the bag?
Mathematics
1 answer:
wolverine [178]3 years ago
3 0

Answer:

There are 132 red marbles and 12 black marbles

Work:

I made a ratio of 11:1 and multiplied both sides by 12 which gave me 132:12

132+12=144


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Citrus2011 [14]

Steps:

See attachment.

Description:

The first step is to simplify the equation step by step and to simplify an equation you can first multiplying the factors and use the exponent rules to remove the parentheses. After that you need to combine it a terms. Then you will get your answer.

For more steps and graph see the attachment.

Answer: 1/12 x + 1/3

Hope this helps.

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Step-by-step explanation:

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Wich of rhe following representents the formula thst could be used to find the height of the cone
VLD [36.1K]

Answer:

Cone volume = [PI * radius ^ 2 * height] / 3   therefore,

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Step-by-step explanation:


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3 years ago
Consider the two expressions 4b(b+1) and (2b+7)(2b-8). Compare their values if b=-3, b=-2, and if b=10. Is it true that for an v
frutty [35]

Answer:

FIRST EXPRESSION:

-  If b=-3, the value of 4b(b+1) is  24

-  If b=-2, the value of 4b(b+1) is  8

- If b=10, the value of 4b(b+1) is  440

 SECOND EXPRESSION:

-  If b=-3, the value of (2b+7)(2b-8)) is  -14

-  If b=-2, the value of (2b+7)(2b-8)) is  -36

- If b=10, the value of (2b+7)(2b-8)) is  324

Yes, for any value of "b" the value of the first expression is greater than the value of the second expression.

Step-by-step explanation:

Substitute the given values of "b" into each expression and evaluate.

- For the first expression 4b(b+1), you get:

If b=-3 → 4(-3)(-3+1)=24

If b=-2 → 4(-2)(-2+1)=8

 If b=10 → 4(10)(10+1)=440

 - For the second expression (2b+7)(2b-8)), you get:

If b=-3 → (2(-3)+7)(2(-3)-8)=-14

If b=-2 → (2(-2)+7)(2(-2)-8)=-36

 If b=10 → (2(10)+7)(2(10)-8)=324

You can observe that for any value of "b" the value of the first expression is greater than the value of the second expression.

7 0
3 years ago
Al and Bill together can complete a work project in 24 days. If Al can do only two-thirds as much as Bill, how long will it take
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Step-by-step explanation:

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