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ioda
3 years ago
15

Round 21 to the nearest hundreds?

Mathematics
1 answer:
evablogger [386]3 years ago
5 0
When you think about it, 21 is closest to 100.
This is the nearest hundred. 

Hope this helps!
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ziro4ka [17]

Answer is in the photo. I can't attach it here, but I uploaded it to a file hosting. link below! Good Luck!

tinyurl.com/wpazsebu

7 0
3 years ago
Let a be a rational number and b be an irrational number. Which of the following are true statements?(there is more than 1 answe
kramer
<span>A.) the sum of a and b is never rational.
This is a true statement. Since an irrational umber has a decimal part that is infinite and non-periodical, when you add a rational number to an irrational number, the result will have the same infinite non periodical decimal part, so the new number will be irrational as well.

</span><span>B.) The product of a and b is rational
This one is false. Zero is a rational number, and when you multiply an irrational number by zero, the result is always zero.

</span><span>C.) b^2 is sometimes rational
This one is true. When you square an irrational number that comes from a square root like </span>\sqrt{2}, you will end with a rational number: ( \sqrt{2} )^{2}=2, but, if you square rationals from different roots than square root like \sqrt[3]{2}, you will end with an irrational number: \sqrt[3]{2^{2} } = \sqrt[3]{2}. 

<span>D.) a^2 is always rational
This one is false. If you square a rational number, you will always end with another rational number.

</span><span>E.) square root of a is never rational
</span>This one is false. The square root of perfect squares are always rational numbers: \sqrt{64} =8, \sqrt{16} =4,...

F.) square root of b is never rational
This one is true. Since the square root of any non-perfect square number is irrational, and all the irrational numbers are non-perfect squares, the square root of an irrational number is always irrational.

We can conclude that given that<span> a is a rational number and b be an irrational number, A, C, D, and F are true statements.</span>
4 0
3 years ago
One number is 3/8 of another number. The difference of the two numbers is 4.2. What is the lesser number
boyakko [2]

Answer:

2.52.

Step-by-step explanation:

If one number is x then the other = 3x/8.

Also x - 3x / 8 = 4.2

x - 0.375 x = 4.2

0.625x = 4.2

x = 4.2 / 0.625

x = 6.72.

So the lesser number is 6.72 * 0.375 = 2.52.

4 0
3 years ago
What is the distance between (–9,-6) and (-2,-2)?
Rufina [12.5K]

Answer:

8.0623

Explanation:

Distance between two points =  √ ( − 2  −  −  9 )^ 2 + ( − 2  −  −  6)^ 2

=  √ 7 ^2+ 4 ^2

= √ 49 +  16

=√ 65  = 8.0623

Distance between points (-9, -6) and (-2, -2) is 8.0623

3 0
3 years ago
Read 2 more answers
HELP ASAP!!!!!!!!!!!!!!!!!
maksim [4K]
The slope for the graph is 2/3 and for the equation the slope is 3/2
8 0
3 years ago
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