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sveta [45]
11 months ago
7

How do I solve Cos-1(0.839) step by step?

Mathematics
1 answer:
Gelneren [198K]11 months ago
5 0

Answer:

32.965°

Explanation:

To solve the expression we need to use the calculator, so:

\text{cos}^{-1}(0.839)=32.965

Therefore, the answer is 32.965°

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What is the solution to the system of equations?
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Answer:

x=-4 y=-1

Step-by-step explanation:

Let's solve your system by substitution.

−3x−8y=20;y=5x+19

Rewrite equations:

y=5x+19;−3x−8y=20

Step: Solve y=5x+19for y:

y=5x+19

Step: Substitute5x+19foryin−3x−8y=20:

−3x−8y=20

−3x−8(5x+19)=20

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−43x−152+152=20+152(Add 152 to both sides)

−43x=172

−43x

−43

=

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(Divide both sides by -43)

x=−4

Step: Substitute−4forxiny=5x+19:

y=5x+19

y=(5)(−4)+19

y=−1(Simplify both sides of the equation)

Answer:

x=−4 and y=−1

 

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