9514 1404 393
Answer:
√42 ≈ 6.48074
Step-by-step explanation:
Put the values in place of the corresponding variables and do the arithmetic.
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42 = 2·3·7 is not a perfect square, nor does it have any perfect square factors. Its square root is irrational.
I think it’s A sorry if I’m wrong
<span><span>Answer by </span>nerdybill(7384) (Show Source):You can put this solution on YOUR website!
<span>The sum of 5 times a number and -2, added to nine times a number.
.
Looking at the first part:
The sum of '5 times a number' and '-2'
we get
5x + (-2)
or
5x - 2
.
The above is then "added to nine times a number" to get:
5x - 2 + 9x
Combining x's we get:
14x - 2
</span>
<span>Answer by </span>mizjoice(22) (Show Source):You can put this solution on YOUR website!
<span>Take it piece by piece:
5 times a number, rewrite as 5x
plus -2, nothing to rewrite there, that's already simplified,
added to nine times a number, rewrite as 9x.
Now, rewrite as an equation:
5x-2+9x = (See, it already looks better!)
Now combine like terms:
5x + 9x -2= 14x - 2</span></span>
There would be 256 bacteria after one day.
There are 24 hours in a day, and the amount of bacteria doubles every 3 hours, so it will double:
24 / 3 = 8 times.
To find the current amount we could use an equation such as:
1 * 2^8 = x
Finally, solve for the number of bacteria:
1 * 2^8 = x
1 * (2 * 2 * 2 * 2 * 2 * 2 * 2 * 2) = x
1 * (4 * 4 * 4 * 4) = x
1 * (16 * 16) = x
1 * 256 = x
x = 256
