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nikitadnepr [17]
3 years ago
10

If (a,a + square root 3) lies on the graph of y=2x, then a = ?

Mathematics
2 answers:
xz_007 [3.2K]3 years ago
7 0
If the point
(a \:  \: a \sqrt{3} )
lies on
y = 2x
then it must satisfy it.

That is

a +  \sqrt{3}  = 2(a)
\rightarrow  \: a  +  \sqrt{3}  = 2a


Grouping like terms we have,

\sqrt{3}  = 2a - a
\therefore \: a =  \sqrt{3}

Ad libitum [116K]3 years ago
5 0

Start with y = 2x.  Subst. a for x and a+sqrt(3) for y:

a+sqrt(3) = 2a

Subtracting a from both sides:  sqrt(3) = a

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Round 630,379,982 to the nearest hundred thousand
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Answer:

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Step-by-step explanation:

630,379,982

The 3 above that is bold, between the 0 and the 7, is in the hundred thousands place.

To round to a place, change all digits to the right of that place to zero. If the digit immediately to the right is 0 through 4, you're done. If the digit immediately to the right is from 5 to 9, then you raise the digit you are rounding to by 1.

Step 1. Make all digits to the right of the hundred thousands digit 0.

630,300,000

Step 2. Since the digit immediately to the right of the hundred thousands digit was a 7, which is from 5 to 9, the digit we are rounding to goes up by 1. The 3 becomes 4.

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Answer: 630,400,000

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3 years ago
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What's perimeter and area?
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