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4 years ago

Mortar is made by mixing cement, sand and quicklime in the ration 1:2:3

Mathematics

1 answer:

timurjin [86]4 years ago

3 0

Answer with step-by-step explanation:

If the ratio for the ingredients is 1:2:3, then the total would be 6. If so, we have to divide 2.1 by 6, which is 0.35. Now, you need to multiply 0.35 to the according ingredient amounts.

Cement: 1 x 0.35 = 0.35

Sand: 2 x 0.35 = 0.70

Quicklime: 3 x 0.35 = 1.05

If you add it up, you will get 2.1, which is the volume.

Hope this helped! (brainliest please)

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Which equation has a constant of proportionality equal to 9 y=81/3x y=9x y=3x y==1/9x

aev [14]

Answer:

B) y = 9 x has Proportionality Constant = 9

Step-by-step explanation:

Two quantities P and Q are said to be PROPORTIONAL if and only if:

P ∝ Q ⇔ P = k Q ⇔ $k = \frac{P}{Q}$

Here, k = PROPORTIONALITY CONSTANT

Given : k = 9

Now, let us consider the given expressions in which x ∝y

y = 81/3 x

Here, $\frac{y}{x} = \frac{81}{3} = 27 \ne 9$

So, here Proportionality Constant ≠ 9

y = 9 x

Here, $\frac{y}{x} = 9$

So, here Proportionality Constant = 9

y = 3 x

Here, $\frac{y}{x} = 3 \ne 9$

So, here Proportionality Constant ≠ 9

y = 1/9 x

Here, $\frac{y}{x} = \frac{1}{9} \ne 9$

So, here Proportionality Constant ≠ 9

Hence, only y = 9 x has Proportionality Constant = 9

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4 years ago

State TWO (2) examples of continuous random variable.

Contact [7]

Answer:

example 1 :

a number of patients in doctor surgery

example 2:

a number of children in a family

<h3>Request:</h3>

if it help full please mark as brain list

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3 years ago

Kelsey makes pendants that she would like to sell at an upcoming craft fair. She must pay $150 to rent a booth at the craft fair

makvit [3.9K]

What is the question? I don't understand.

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3 years ago

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gayaneshka [121]

Answer:

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Step-by-step explanation:

Substitute 6 for r and -2 for t in the formula given

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3 years ago

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nika2105 [10]

Answer:

Step-by-step explanation:

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