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JulsSmile [24]
4 years ago
6

PLEASE HELP! find f(-2) for f(x) = 2x^x

Mathematics
2 answers:
Andre45 [30]4 years ago
6 0

Answer:

B. \frac{2}{9}

Step-by-step explanation:

We need to find f(-2) for f(x)=2*3^x

To do this, we need to replace each instance of x in the equation with -2

f(x)=2*3^x\\\\f(-2)=2*3^{-2}

Now, we can remove the negative exponent by rewriting the equation

f(-2)=2*\frac{1}{3^2}

And now we can simplify

f(-2)=2*\frac{1}{9}\\ \\f(-2)=\frac{2}{9}

Allushta [10]4 years ago
4 0

Answer:

B . \frac{2}{9}

Step-by-step explanation:

3^{-2} =0.1111\\

2 x 0.1111 = .2222

\frac{2}{9} = 0.2222

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I think the answer is that Best Market sells strawberries at a higher unit price, and that you would have to pay $5.40 more at that store than the other.

Step-by-step explanation:

If we take a look at the graph, we can see that 1 pound of strawberries is worth 2$. That makes the unit price, or the price of per one unit of the item, 2$ for  Fine Foods.

In thd directions, they gave us the equation y = 2.9x for strawberries at Best Market. To find the unit price for Best Market, we would have to substitute x for 1 since x represent pounds, and we're trying to find how much 1 pound costs to find the unit price. It would look like this:

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So, the unit price at Best Market would be 2.90$.

Comparing the unit prices, 2.90$ is bigger than &2. So, Best Market sells strawberries at a higher unit price. To find out how much 6 pounds of strawberries at Best Market is, all we have to do is substitute x for 6 in y = 2.9x like so:

y = 2.9 (6)

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