Given the function,f(x)=x^2+2x+1,which of the following is the value of f(-2)?
1 answer:
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Answer:
Step-by-step explanation:
Answer:
Step-by-step explanation:
Answer:
$19.68
Step-by-step explanation:
To find out how much it'll cost Melissa to buy the ribbon, we simply need to find all the side lengths (the perimeter) and then multiply then by the cost.
We already know two of the side lengths: 6 and 8. To find the third, remember that the question tells us that the triangle is a right triangle. Therefore, we can use the Pythagorean Theorem. The unknown side is the longest side. Therefore:
Substitute 6 for a and 8 for b. This gives us:
Solve for c. Square the values:
Add:
Take the square root of both sides:
Therefore, our unknown side is 10 feet.
Therefore, the sum of our side lengths or the perimeter is:
Add:
This means that the total cost will be:
Multiply. The foot/feet cancel:
Multiply:
So, it will cost Melissa a total of $19.68 to buy the ribbon.
And we're done!
Edit: Typos
Answer:
***
Answers may vary depending on the person reading the graph.
It is hard to tell what they think crosses nicely.
For example, I decided that the graph crossed nicely at the following points:
Step-by-step explanation:
I see that the graph crosses at ,
, and
.
The equation tells us the
-intercept is
since when
we have
.
The -intercept for our graph is
. Therefore,
.
So far we have the equation:
.
Let's enter the other points creating a system of linear equations to solve:
Let's simplify:
Let's subtract 3 on both sides:
I choose to solve the system by elimination.
Let's multiply the top equation by -3:
Now adding the equations results in:
Divide both sides by 24:
Now using one of the equations we can find :
with
Add 13/6 on both sides:
Divide both sides by 2:
So we have the equation:
Let's evaluate now: