How do u do positive and negatives

2 answers:

7 0

Negative and a positive =positive
Negative and a negative=positive
Positive and a positive =positive
(Doesn’t apply with addition)

Oduvanchick [21]3 years ago

5 0

well if its 2 negatives multiplied it will change to a positve and if its a negative times a postive it will change to a negative

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3 years ago

Given h(x) = 2x - 3 , solve for when h(x) = - 3 .

FrozenT [24]

Answer:

h(x)=-3;x=0

Step-by-step explanation:

When given h(x), you are in effect, being given the output of the function.

So, placing h(x)=-3 in place for h(x)

We get

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3 years ago

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Ahat [919]

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Step-by-step explanation:

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8 0

3 years ago

Read 2 more answers

If sin theta equals 12 divided by 13 and theta is in quadrant 2 cos20 equals? and cos theta equals?

Anni [7]

Answers:

cos(2theta) = -119/169
cos(theta) = -5/13

=====================================================

The given info is:

sin(theta) = 12/13
theta is in quadrant II

From that, we can use the pythagorean trig identity to find that cos(theta) = -5/13. Keep in mind that cosine is negative in quadrant II.

Now use the trig identity below to compute cos(2theta)

$\cos(2\theta) = \cos^2(\theta)-\sin^2(\theta)\\\\\cos(2\theta) = \left(\frac{-5}{13}\right)^2-\left(\frac{12}{13}\right)^2\\\\\cos(2\theta) = \frac{25}{169}-\frac{144}{169}\\\\\cos(2\theta) = \frac{25-144}{169}\\\\\cos(2\theta) = -\frac{119}{169}\\\\$