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Mumz [18]
2 years ago
5

Please help with this algebra!! I’m

Mathematics
1 answer:
stiks02 [169]2 years ago
7 0

Answer:

(-4, -1)

Step-by-step explanation:

x = 4y

-4x - y = 17

Plug in 4y for x in the second equation:

-4(4y) - y = 17

Simplify. Remember to follow PEMDAS. Isolate the variable, y. Note the equal sign, what you do to one side, you do to the other.

First, multiply 4y with -4:

-4(4y) = -16y

-16y - y = 17

Simplify. Combine like terms:

-16y - y = 17

-17y = 17

Isolate the variable, y. Divide -17 from both sides:

(-17y)/-17 = (17)/-17

y = 17/-17

y = -1

Plug in -1 for y in the first equation:

x = 4y

x = 4(-1)

x = -4

x = -4, y = -1

Answer: (-4, -1)

~

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Answer:

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Step-by-step explanation:

This is in standard form so we have to factor this into

x^2-8x + 16 + 1 = 16

(x-4)^2 = 15

(x-4) = \sqrt{15\\}

x-4= ± 3.87298334621

x-4 = 3.87298334621                      x-4= -3.87298334621

x= 7.87298334621                          x=.12701665379

7 0
2 years ago
Given The following Graph:<br><br> a.)Evaluate f(0). <br> b.) Solve for f(x) = -3
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Answer:

see explanation

Step-by-step explanation:

a

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That is f(0) = 1 ← the point (0, 1) on the graph

b

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From the graph when y = - 3 there are 2 corresponding values of x, that is

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The solution to f(x) = - 3 is x = ± 2

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Yvonne ran up 1/4 of the total flights of staris in an office building and walked up the rest of she
Korolek [52]
Yvonne ran up 12 flights of stairs.

Explanation:
Understand the situation:

Yvonne ran up 1/4 of the total stairs. Afterwards, she walked the REST of the stairs, which is said to be 9 STAIRS. HOW MANY flights of stairs IN TOTAL did she run up?

When she ran the REST of the stairs, it meant she ran the other 3/4 of stairs because:
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To add someting, that means that the 9 stairs is 3/4 of the total stairs, so lets fins the total stairs using this information:
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LETS CHECK IF 9 IS REALLY 3/4 of 12:
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hodyreva [135]

Answer:

x + y = 500

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Step-by-step explanation:

The first equation can show the amount of land.  The farmer has 500 acres to plant corn, x, and cotton, y.

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The second equation can show the cost.  The farmer has $187,500 to invest when corn costs $215 per acre and cotton costs $615 per acre.

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The system of equations is

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4 0
3 years ago
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