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4 years ago

Which numbers are rational? select all that apply. A. pi B. √50 C. 2.3 D. √144

Mathematics

2 answers:

REY [17]4 years ago

6 0

Answer:

C and D

Step-by-step explanation:

2.3 (repeating) repeats itself over and over again into infinity.

pi goes on into infinity.

aev [14]4 years ago

5 0

C. 2.3
D.√144

Rational roots or decimals are numbers that have an end point.

pi 'technically' never ends, while √50 = 7.07106781<span>…, which never ends either
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hope this helps

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The group of points {(0, 1), (0, 5), (2, 6), (3, 3)} is not a function, but the group of points {(1, 4), (2, 7), (3, 1), (5, 7)}

fomenos

{(0, 1), (0, 5), (2, 6), (3, 3)} is not a function because zero is repeated in (0, 1),(0, 5)

While

{(1, 4), (2, 7), (3, 1), (5, 7)} is a function because there is no repetition in domain i.e. first element of each ordered pair is unique.

Step-by-step explanation:

To decide whether a relation is a function or not, the first elements of each ordered pair (domain) are observed. In order for a relation to be a function, there should be no repetition in first elements of each ordered pair.

In the given group of points:

{(0, 1), (0, 5), (2, 6), (3, 3)} is not a function because zero is repeated in (0, 1),(0, 5)

While

{(1, 4), (2, 7), (3, 1), (5, 7)} is a function because there is no repetition in domain i.e. first element of each ordered pair is unique.

Keywords: Domain, Range

Learn more about functions at:

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3 years ago

If f (x) = startroot one-half x minus 10 endroot 3, which inequality can be used to find the domain of f(x)? startroot one-half

tankabanditka [31]

A function assigns values. The inequality one-half x minus 10 greater-than-or-equal-to 0 should be satisfied.

<h3>What is a Function?</h3>

A function assigns the value of each element of one set to the other specific element of another set.

The domain of a function is a set of values for which the equation is satisfied. Since the function has under root values, the value which is under the root should be non-negative so that it does not give a complex number, therefore,

The inequality $\sqrt{\dfrac12x^2-10}\geq 0$ satisfied to find the domain of the function f(x).

Also, we can write that 0.5x²-10≥0 for the value to be positive.

Hence, the inequality one-half x minus 10 greater-than-or-equal-to 0 should be satisfied.

Learn more about Function:

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2 years ago

Jack runs at an average speed of 4 miles for one hour. He then cycles 6 miles at 12 miles per hour. find his average speed for t

igor_vitrenko [27]

He ran 4 miles per hour for one hour, which means he ran 4 miles.

He cycled 6 miles at 12 miles per hour, which means he cycled for one half an hour.

His total miles was 4 + 6 = 10 total miles.

His total time was 1 hour + one half an hour = 1.5 hours.

His average speed is total distance divided by total time:

10 / 1.5 = 6 2/3 miles per hour.

3 0

3 years ago

2x - 3y = 14<br> 5x - 3y = -10

pshichka [43]

Answer:

x = -8

y = -10

Step-by-step explanation:

Elimination

2x - 3y = 14

5x - 3y = -10

__________--

-3x = 24

x = 24/-3

x = -8

Subsitution

2x - 3y = 14

2(-8) - 3y = 14

-16 - 3y = 14

-3y = 14 + 16

-3y = 30

y = 30/-3

y = -10

5 0

3 years ago

Tariq also designs hot tubs. The diameter of the hot tub is 3 meters. What is the area of the deck that surrounds the hot tub? I

lutik1710 [3]

Answer:

C. 17.9

Step-by-step explanation:

First you have to find the area of the circle, to then subtract it from the area of the square around it.

To get the area of the circle you must take the radius(half of the diameter) and square it. 3^2 is 9. Then you mutiply that by Pi( 3.14). Which is 7.07.

Next you have to subtract that from the area of the square deck.

25-7.07=17.9

6 0

3 years ago

Read 2 more answers