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3 years ago

What is the solution of the equation x^2 + 2x -7=0

Mathematics

1 answer:

frosja888 [35]3 years ago

5 0

Answer:

x = -1 + 2 sqr2

x = -1 -2 sqr2

Step-by-step explanation:

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2 years ago

Which statements about the graph of f(x) =√x are true?

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Step-by-step explanation:

So let's think about what values you can take square root of...

anything but negative values!

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squareroot of 0 is 0.

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3 years ago

What is the maximum value of the expression -5x^2 + 100x + 4,000?

Ludmilka [50]

Answer:

4500

Step-by-step explanation:

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3 years ago

Find sin theta if theta is an angle in standard position and the point with coordinates (3, -4) lies on the terminal side of an

alisha [4.7K]

Answer:

$\sin \theta=-\frac{4}{5}$

Step-by-step explanation:

Given:

Angle is in standard position which means the starting ray is at the origin. The terminal side has coordinates (3, -4).

So, the 'x' value is 3 and 'y' value id -4.

Using Pythagoras Theorem, we find the hypotenuse.

Hypotenuse = $\sqrt{3^2+(-4)^2}=\sqrt{9+16}=\sqrt{25}=5$

Now, using the sine ratio for the angle, we have

$\sin \theta=\frac{Opposite}{Hypotenuse}\\\sin \theta=\frac{-4}{5}\\\sin \theta=-\frac{4}{5}$

Therefore, the value of $\sin \theta$ is $-\frac{4}{5}$ .

The value is negative as the point (3, -4) lies in the fourth quadrant and sine ratio is negative in the fourth quadrant,

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3 years ago