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boyakko [2]
2 years ago
11

Sebastian made the following model to find the product 17 x 24 is his model correct explain

Mathematics
2 answers:
Grace [21]2 years ago
7 0

Answer:

No, it is not correct.

Step-by-step explanation:

Here, the given problem,

17 × 24

∵ 17 = 10 + 7

And, 24 = 20 + 4

Thus, 17 × 24 = (10 + 7)(20 + 4)

= 10 × 20 + 10 × 4 + 7 × 20 + 7 × 4

= 200 + 40 + 140 + 28

= 408

By comparing the above steps and Sebastian's model,

It is clear that he did incorrectly multiply 7 by 20,

i.e. he must write 140 instead of 40 while adding.

Verdich [7]2 years ago
3 0
Sebastian's model is not correct because 20x7 does not equal 14.
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Answer:

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Step-by-step explanation:

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-multiply the 2 to the 3 and 6y

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hope this helps :)

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Can someone create two expressions that are equivalent to 3(4j + 4 + j). Please show all steps in your work.
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A rectangle is 1/3 yd long and 2/3 yd wide
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3 years ago
The magnitude and direction of two forces acting on an object are 100100 ​pounds, S7878degrees°​E, and 5050 ​pounds, N5353degree
amm1812

Answer:

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Step-by-step explanation:

There are several ways you can work this. One of the most straightforward is to resolve each vector into its north and east components, add those, and then covert the result back to magnitude and direction.

A diagram can help immensely.

We note that S78°E is the same as E12°S. Since we're used to seeing the coordinate system with the +x axis aligned with east, it can be convenient to think of the first force as 100 lb at -12°.

The angle of the second force is N53°E, which can be expressed as E37°N. Then in x-y coordinates, this force is 50 lb at +37°.

The components of the sum are the sum of the components:

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The the magnitude of the resultant is computed using the Pythagorean theorem:

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and the angle is computed using the arctangent function. Here, our diagram tells us the angle is in the first quadrant, so is positive (relative to +x, or East).

  ∠R = arctan(9.300/137.747) ≈ 3.9°

__

We want to express the answer in terms similar to the way the given forces are expressed, so we want the angle relative to north. The resultant is then described by ...

  R = 138.06 lb at N86.1°E

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What is the property of 7/9 * 1 = 7/9
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Answer:

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Step-by-step explanation:

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