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3 years ago

Explain when a trapezoid is not a parallelogram. Sketch an example.

Mathematics

1 answer:

rjkz [21]3 years ago

5 0

A quadrilateral is a parallelogram if it has two pairs of parallel sides.

A quadrilateral is a trapezoid if it has one pair of parallel sides.

This implies that all parallelogram are trapezoid: if you have two pairs of parallel sides, you have one pair of parallel sides - you actually have more than required.

On the other hand, not all trapezoid are parallelogram: if you have one pair of parallel sides, you can't be sure that the other pair of sides will be parallel, too.

So, a trapezoid is not a parallelogram if it has only one pair of parallel sides, and the other two are not parallel.

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Which expression can be used to model the phrase “ the sum of three and a number”?

olga nikolaevna [1]

Answer:

x + 3

Step-by-step explanation:

A 'sum' means addition, 'a number' is represented by a variable, in this case, I chose 'x'. I could have picked any variable I wanted.

The sum of three and a number means: three plus some number, which is

3 + x in math language. We write variables before constants, so it gets

rewritten as x + 3

5 0

3 years ago

Read 2 more answers

The Graduate Management Admission Test (GMAT) is a standardized exam used by many universities as part of the assessment for adm

IgorC [24]

Answer:

16.7% of GMAT scores are 647 or higher

Step-by-step explanation:

The Empirical Rule states that 68% of the values are within 1 standard deviation of the mean(34% above, 34% below). It also considers that 50% of the values are above the mean and 50% are below the mean.

In this problem, we have that the mean $\mu$ is 547 and that the standard deviation $\sigma$ is 100.

a. What percentage of GMAT scores are 647 or higher?

647 is 1 standard deviation above the mean.

So, 50% of the values are below the mean. Those scores are lower than 647.

Also, there is the 34% of the values that are above the mean and are lower than 647.

So, there is a 50% + 34% = 84% percentage of GMAT scores that are 647 or lower.

The sum of the probabilities must be 100

So, the percentage of GMAT scores that are 647 or higher is 100% - 84% = 16%.

3 0

3 years ago

Oranges sell for $5.00 per bag. If there are 10 oranges in each bag, how much is the price per orange?

yulyashka [42]

Answer:

The answer is A

Step-by-step explanation:

10 divided by 5

8 0

3 years ago

Read 2 more answers

The right part of a figure is shown. The left part of this figure is missing. Line h is a line of symmetry. Which choice shows t

myrzilka [38]

Answer:the first one

Step-by-step explanation:

8 0

3 years ago

I didn’t pay attention in class help

Alona [7]

Answer:

The 1/4th power means the 4th root of a number.

Therefore for the first question, the answer should be 4th root of 1296 -4th root of 625. or \sqrt[4]{1296}

1296

-\sqrt[4]{625}

625

For the second question just calculate? what to the 4th power is 1296 and what to the 4th power is 625?

They should respectively be 6 and 5. So the final answers we get is 6-5=1

If you have any questions about this just ask me in the comment and I will get to it as soon as I could.

hopecthis helps

4 0

3 years ago