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marishachu [46]
3 years ago
5

Which ordered pair is a solution to the system of linear equations Negative 4 x + y = 8 and x minus 5 y = 17?

Mathematics
1 answer:
Zinaida [17]3 years ago
8 0

Answer:

(-3, -4).

Step-by-step explanation:

-4x + y = 8

x - 5y = 17           Multiply this by 4:

4x - 20y = 68     Add this to the first equation:

-19y = 76

y = 76/-19

y = -4.

Plug this into the second equation:

x - 5(-4) = 17

x = 17 - 20

x = -3.

CHECK this result in equation 1:

-4(-3) + -4 =  8

12 - 4 = 8

8 = 8  <------ OK.

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Answer:

‹A = 141°

‹B = 28°

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*These angles are rounded to the nearest whole*

Step-by-step explanation:

Because you are only given sides you can find an individual angle measures with the inverse law of cosines.

Remember the side opposite of the angle corresponds to that angle.

a² = b² + c² - 2bc cos(A) →

A = cos⁻¹ (a² - b² - c² / -2bc)

b² = a² + c² - 2ac cos(B) →

B = cos⁻¹ (b² - a² - c² / -2ac)

c² = a² + b² - 2ab cos(C) →

C = cos⁻¹ (c² - a² - b² / -2ab)

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2 years ago
Find the equation of a line passing through ( -1/2,1/2) with a slope of 5.
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The correct answer is c because when I graphed each one the only one that passed through your given coordinate was that equation
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Shante is calculating the amount of time it takes a rocket to get to the moon. The moon is around 239,000 miles from Earth. How
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Answer: 20 hours

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Now, we want to find how many hours it would take for the rocket to travel from the earth to the moon.

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Which choice is equivalent to the quotient shown here when x is greater than or equal to 0?
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Step-by-step explanation:

Remember that:

\sqrt[n]{a^n}=a

And the Product of powers property establishes that:

a^m*a^n=a^{(mn)}

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