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2 years ago

A, B and C are integers. A minus B is even and A minus C is odd. which of the following must be odd?

Mathematics

1 answer:

jek_recluse [69]2 years ago

6 0

Answer:

C: B+C

Step-by-step explanation:

A-B is even so A and B are either both even or odd.

A-C is odd so one is even and the other is odd.

Because A is common to both cases B and C have to be of different parities.

In answer A, B, and D we are not sure of the parity of the numbers.

However, in answer C we know that B and C are of different parities, and and even plus and odd is odd.

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A square piece of paper 10 cm on a side is rolled to form the lateral surface area of a cylinder and then a top and bottom are a

Anika [276]

Answer:

The surface = pi*10cm2

Step-by-step explanation:

The area of any rectangle is Base * Height,

We know that the square originally has 10cm High, when is rolled to form a cylinder, it's new shape has a bottom side that is equals to a circle.

The length of a circle is 2*pi*Radio= pi*Diameter.

Since the square has the same length in each side, we know that pi*Diameter= 10cm*pi

The surface (area) of the cylinder is= Base * Height= 10cm*10cm*pi

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3 years ago

In an experiment, a ball is drawn from an urn containing 11 orange balls and 8 blue balls. If the ball is orange, three coins ar

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Answer:

a) 4

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Step-by-step explanation:

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So, clearly, 8 sample points will have an orange ball.

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So, clearly, 4 samples points will when a blue ball is drawn.

Total samples points=4+8=12

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3 years ago

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Answer:

Step-by-step explanation:

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Step-by-step explanation:

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3 years ago

A, B and C are integers. A minus B is even and A minus C is odd. which of the following must be odd? ￼

A, B and C are integers. A minus B is even and A minus C is odd. which of the following must be odd?