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Semenov [28]
3 years ago
15

If tan θ=−4/7, and 270°<θ<360°, what is sec θ?

Mathematics
1 answer:
kondaur [170]3 years ago
5 0

Answer:

1.15

Step-by-step explanation:

tan θ=−4/7, and 270°<θ<360°

θ is in 4th quadrant

sec θ = 8.06 / 7 = 1.15

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Use completing the square to solve for x in the equation (x+7)(x-9) = 25.
balandron [24]

Answer:

x = 1  ±√89

Step-by-step explanation:

We have the equation:

(x+7)(x-9) = 25

Using distributive property:

x(x-9) + 7(x-9) = 25

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To complete squares we need to add and subtract 1, as follows:

x²- 2x - 88 +1 -1 = 0

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Solving for x:

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3 years ago
Can someone help me with this
insens350 [35]
Let's solve this problem step-by-step.

STEP-BY-STEP EXPLANATION:

We will be using simultaneous equations to solve this problem.

The sum of angles on a straight line is 180°.

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Equation No. 1 -

R + 2x + 5 = 180

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Vertically opposite angles are equivalent to each other.

( R ) is vertically opposite ( 3x + 15 ).

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R = 175 - 2 ( 32 )

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FINAL ANSWER:

Therefore, the answer is:

R = 111

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Hope this helps! :)
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