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tigry1 [53]
3 years ago
8

Find the solution by graphing or from the graph y=x2-2x-8 how do you do this?

Mathematics
1 answer:
Tomtit [17]3 years ago
3 0

Answer:

-2 and 4

Step-by-step explanation:

Graph it using a graphing calculator.  The solutions are the points where the graph crosses the x-axis.

I attached a photo of the graph, you can see that the graph crosses the x-axis at points -2 and 4

These are the solutions!

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Can you find both the value of x and y? It is a 30-60-90 triangle
Juli2301 [7.4K]

Answer:

x = 8*root3

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Step-by-step explanation:

You can use tangent and cosine of 60° to find x and y, BUT THERE'S A SHORTCUT. You pointed out that its a 30°-60°-90° triangle. That is a special right triangle. Here's the shortcut:

the longest side (hypotenuse) is double the shortest side. We have an 8 on the shortest side, so the hypotenuse (longest side) is 16. This ALWAYS works for 30°-60°-90° triangles!

Another shortcut:

The longer leg is the shorter leg × root3.

This ALWAYS works on 30°-60°-90° triangles.

So on your triangle, the short side is 8, that means the longer leg is 8×root3.

ta-daaaa!

3 0
2 years ago
Fernando had 20 minutes to do a three-problem quiz. He spent 10 9/10 minutes on question A and 5 3/5 minutes on question B. How
katrin2010 [14]

Answer:

1.65 minutes

Step-by-step explanation:

10 9/10 + 5 3/5 = 16 1/2

16 1/2 divided by 20 = 1.65 or 33/20

4 0
3 years ago
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Answer:6

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

To find out how many cups of blueberries per jar, we take the number of cups of blue berries and divide by the number of jars

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Step-by-step explanation:

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