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Softa [21]
3 years ago
14

Please show workings on how to do it :)

Mathematics
2 answers:
Korvikt [17]3 years ago
7 0

Answer:

here

Step-by-step explanation:

ratio:

1x, 3x, 5x=180

9x=180

x=180/9

x=20

forgot to mention 1x=cement

3x=sand and 5x=gravel.

I only know first part of the question.

arsen [322]3 years ago
5 0

Answer:

Let the ratio be x,3x,5x

then,

or,x+3x+5x=180kg

or,9x=180

or,x=180/9

or,x=20kg

now,3x=3*20

=60kg

5x=5*20

=100 kg

therefore he doesn't have enough cement and sand but he has enough gravel.

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There are 20 machines in a factory. 7 of the machines are defective.
adelina 88 [10]

Answer:

0.1225

Step-by-step explanation:

Given

Number of Machines = 20

Defective Machines = 7

Required

Probability that two selected (with replacement) are defective.

The first step is to define an event that a machine will be defective.

Let M represent the selected machine sis defective.

P(M) = 7/20

Provided that the two selected machines are replaced;

The probability is calculated as thus

P(Both) = P(First Defect) * P(Second Defect)

From tge question, we understand that each selection is replaced before another selection is made.

This means that the probability of first selection and the probability of second selection are independent.

And as such;

P(First Defect) = P (Second Defect) = P(M) = 7/20

So;

P(Both) = P(First Defect) * P(Second Defect)

PBoth) = 7/20 * 7/20

P(Both) = 49/400

P(Both) = 0.1225

Hence, the probability that both choices will be defective machines is 0.1225

4 0
3 years ago
How do you solve this equation? 5p + 10 = 6p + 22
lisov135 [29]

Answer:

-12 = p

Step-by-step explanation:

Isolate the p terms on one side and the constants on the other side.  Subtract 5p from both sides:  10 = p + 22.  Next, subtract 22 from both sides, obtaining

-12 = p

5 0
3 years ago
Read 2 more answers
A marker bought for Rs 50 was sale at a profit of 5%. find the selling price.
Vikentia [17]

Answer:

52.5

Step-by-step explanation:

=50+50×5%

=50+2.5

=52.5

3 0
3 years ago
Read 2 more answers
Pro
Anna11 [10]

Answer:

explain

Step-by-step explanation:

3 0
3 years ago
The function below has been transformed from f(x) = x2. Describe the transformation. h(x) = 4x2 + 12
Semenov [28]

Answer:

  • vertically expanded by a factor of 4
  • then, translated upward 12 units

Step-by-step explanation:

If f(x) = x² and g(x) = 4x² = 4f(x), the function g(x) represents a vertical expansion of f(x) by a factor of 4.

If h(x) = g(x) +12, the function h(x) represents a translation of g(x) by 12 units upward.

Together, these transformations on f(x) are ...

  • vertical expansion by a factor of 4
  • translation upward by 12 units

_____

Please be aware that there are alternate transformations that will do the same thing:

  h(x) = 4(f(x) +3) . . . . is a translation upward by 3, then a vertical expansion by a factor of 4

  h(x) = f(2x) +12 . . . . is horizontal compression of f(x) by a factor of 2, then a translation upward by 12.

3 0
3 years ago
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