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blsea [12.9K]
3 years ago
10

Solve: 4 - 10x >-21 and aranh the

Mathematics
1 answer:
Luden [163]3 years ago
8 0

Answer:

x < \frac{5}{2}

Step-by-step explanation:

4 - 10x > -21

-10x > -25\\\\x > \frac{-25}{-10} \\\\x > \frac{5}{2}

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Find the area and perimeter.
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Answer:

Step-by-step explanation:

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1. tan a = cot(a + 10°)
Temka [501]

Answer:

a=40+90n

Step-by-step explanation:

Use a cofunction identity on the right hand side or left hand side...

So \tan(a)=\cot(90-a).

We have the equation:

\tan(a)=\cot(a+10)

Make the above replacement:

\cot(90-a)=\cot(a+10)

Since cotangent has period 180 degrees, we can also write this as:

\cot(90-a+180n)=\cot(a+10)

So solving the following will give us a set of solutions for a:

90-a+180n=a+10

Add a on both sides:

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Subtract 10 on both sides:

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Divide both sides by 2:

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a=40+90n

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