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Leya [2.2K]
3 years ago
12

A student says that the square root of 7 is a rational number because it can be written as [The square root of 7] over 1. Is the

student correct? explain
Mathematics
1 answer:
Brut [27]3 years ago
3 0
Let's start by defining what a rational number is. It is a number that is expressed as a fraction. It could also be in decimal form, but only in circumstances when the decimal places are exact and not continuous or repeating. Let's take for example √7. Its exact value is 2.645751311. The decimals places are random and continuous that's why it can't be expressed into fraction. But if the decimal for is, say, 0.25, that is rational because it can be expressed to 1/4.

Now, the reason where it could be a fraction by using a denominator of 1 is invalid. All whole numbers have a denominator of 1. It is implicitly defined because any number divided by 1 is equal to the number itself. This is not a basis for a characteristic of a rational number. Therefore, the student is incorrect.
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Jill is buying new appliances. The cost of the dishwasher is $459 and the cost of the microwave is $289. What is the total price
romanna [79]

Answer:

$800.36

Step-by-step explanation:

429+289=748

7% of 748= 52.36

748 + 52.36=800.36

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If x varies directly as y, and x=12 when y=3, find x when y=7
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Answer:

28

Step-by-step explanation:

x=12 and y=3

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3 years ago
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The area of the larger circle is??
nevsk [136]

radius of small circle = 16 m

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answer

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Pete walks 6 miles during each trip to school. How many trips does he need to make in order to make in a total of 48 miles?​
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8 trips

Step-by-step explanation:

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8 0
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Please answer a through d
Elza [17]

Answer:

See explanation below.

Step-by-step explanation:

Given: 100 lbs on Earth is 16.6 lbs on the moon.

a. The independent variable is weight. The gravity of the Moon and the gravity of the Earth are constant. Weight can change, but gravity is a constant.

b. An equation that relates the weight of someone on the Moon who travels to the Earth:

100 / 16.6 = 6.02. Take the Moon weight and multiply by 6.02:

Moon Weight * 6.02 = Earth Weight.

Proof:

16.6 * 6.024 = 99.99 - approximately 100 lbs Earth weight.

c. A 185 lb astronaut on Earth would weigh:

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d. A person who weighs 50 lbs on the Moon:

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Hope this helps! Have a good day and year! :)

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2 years ago
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