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valkas [14]
3 years ago
15

Find the size of angle BAC. Give your answer to 3 significant figures

Mathematics
1 answer:
Alex777 [14]3 years ago
6 0

Answer:

50.5

Step-by-step explanation:

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What is the slope of the line passing through the points (5,7) (-4,2)
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3 years ago
X2 - 4x + 4 = 0 solve following quadratic equations graphically and a table
stepan [7]

Let's create a table, and use arbitrary values of x between -3 and 3 (if the solution is not in this interval, we can use another one later). If we call:

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This is the table:

And now we can evaluate f(x) in each value of x to complete the table:

\begin{gathered} f(-3)=(-3)^2-4\cdot(-3)+4=9+12+4=25 \\ f(-2)=(-2)^2-4\cdot(-2)+4=4+8+4=16 \\ f(-1)=(-1)^2-4\cdot(-1)+4=1+4+4=9 \\ f(0)=0^2-4\cdot0+4=4 \\ f(1)=1^2-4\cdot1+4=1-4+4=1 \\ f(2)=2^2-4\cdot2+4=4-8+4=0 \\ f(3)=3^2-4\cdot3+4=9-12+4=1 \end{gathered}

The table is:

If we use this values and plot them in the cartesian plane.

We get:

And now if we plot a line that connects the points, we get the graph of the quadratic equation:

Since the problem ask us to find the value of x for which f(x) = 0, we can see both in the table and in the graph that this value is x = 2

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Subtract: 3x^2 -7x + 4 from 5x^2 - 3x + 8.
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Step-by-step explanation:

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