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3 years ago

Solve each of the following system of equations by substitution!!! x-5y=-49 y=-2x+1

Mathematics

1 answer:

saul85 [17]3 years ago

8 0

Answer:

(-4,9)

Step-by-step explanation:

substitute the given value for y into the first equation

x-5(-2x+1)=-49

distribute

x+10x-5=-49

add like terms

11x-5=-49

add 5 to both sides

11x=-44

divide both sides by 11

x=-4

now plug x into into the second equation

y=-2(-4)+1

y=8+1

add like terms

y=9

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the mobile company charges $180 for an hour of service how many dollars are customers charged every minute

Artemon [7]

$180 divided by the minutes in an hour (60)

180 / 60 = 3

They are charged $3 every minute.

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4 years ago

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Which of these values of x is NOT a solution of the equation tanx= 1?

Kobotan [32]

The tangent ratio is an illustration of the trigonometry identity

The value of x that is not a solution of tan(x) = 1 is 3 $\pi$ /4

<h3>How to determine the value that is not a solution</h3>

The trigonometry identity is given as:

tan(x) = 1

Next, we test the x values using a calculator.

When $x = -7\pi/4$ , we have:

tan(-7 $\pi$ /4) = 1

When x = 3 $\pi$ /4, we have:

tan(3 $\pi$ /4) = -1

When x = 5 $\pi$ /4, we have:

tan(5 $\pi$ /4) = 1

When x = $\pi$ /4, we have:

tan( $\pi$ /4) = 1

Hence, the value of x that is not a solution of tan(x) = 1 is 3 $\pi$ /4

Read more about trigonometry identity at:

brainly.com/question/7331447

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3 years ago

When did civil rights activists lead wade-ins at St. Augustine beaches and hotel pools?

SOVA2 [1]

Answer:

I would say d.1964!

8 0

3 years ago

(-3x3 + 5x2 + 4x – 7) + (-6x2 + 2x - 3) how was this solved

lisov135 [29]

Answer:

You add common factors

Step-by-step explanation:

-3x^3 is the only x^3

5x^2 and -6x^2 can be added to get -x^2

4x and 2x can be added to get 6x

-7 and -3 can be added to get -10

the answer is -3x^3-x^2+6x-10

7 0

4 years ago

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In circle N, KL ≅ ML. Circle N is shown. Line segments N J, N M, N L, and N K are radii. Lines are drawn to connect each point o

Sergeu [11.5K]

Answer:

$arc\ JM=132^o$

Step-by-step explanation:

The picture of the question in the attached figure

step 1

we know that

$arc\ JM+arc\ ML+arc\ LK+arc\ KJ=360^o$ ----> by complete circle

substitute the given values

$(13x+2)^o+(8x-3)^o+(7x+7)^o+(5x+24)^o=360^o$

solve for x

$(33x+30)^o=360^o\\33x=360-30\\33x=330\\x=10$

step 2

Find the measure of arc JM

$arc\ JM=(13x+2)^o$

substitute the value of x

$arc\ JM=(13(10)+2)^o=132^o$

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4 years ago

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