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3 years ago

How do you do this simultaneous equation?

Mathematics

1 answer:

tatiyna3 years ago

5 0

The y is the same for both equations. Equate them
-x - 5 = 2x + 4 Add x to both sides
- 5 = 3x + 4 Subtract 4 from both sides.
- 9 = 3x Divide by 3
x = -9 / 3
x = - 3

y = - x - 5
y = -(-3) - 5
y = - 2

So that point is where the two equations meet.

To see the graph of your question on the internet, go to
Wolframalpha.com
and put this string in the question space.
y = -x - 5; y = 2x + 4 Note the semi colon in the middle.

To the moderator: This is my own work. I'm using Wolfram to get the answer.

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In triangle JKL, tan(bº) =

VikaD [51]

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3 years ago

Find the area of the parallelogram. Round to the<br> nearest tenth.

muminat

Answer:

Step-by-step explanation:

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Since tan(35)=4/(longer dotted leg of the triangle), the length of this longer dotted leg is thus 4/tan(35).

Since A=bh, the area is (4/tan35)(12), and you can just plug this into a calculator.

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2 years ago

14. The circle graph shows the results of an employment survey of 800

MariettaO [177]

Answer:

480 people were unemployed full time

Step-by-step explanation:

First thing to do here is to check the percentage of people that were unemployed full time

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8 0

3 years ago

If x2 + y2 = 38 and x - y = 2, then what is x? If there are two possible answers, then enter the larger of the two.

Ket [755]

If x-y=2 then x=2+y

And if you insert that in the first equation

$(2 + y) {}^{2} + y {}^{2} = 38$
$4 + 4y + y {}^{2} + {y}^{2} = 38$
$2y {}^{2} + 4y - 34 = 0$
$y = - 1 + \sqrt{17}$
Or
$y = - 1 - \sqrt{17}$

The first one is bigger so the answer is

$y = - 1 - \sqrt{17}$

7 0

3 years ago

Read 2 more answers

3. The functions f and g are defined by f: x → ax – b where a and b are constants and g: x → X+4.

valentinak56 [21]

Answer:

fg(2) = 9 means that f(g(2)) = 9

We know that g(2) = 6

So f(6) = 9 which means that

6a - b = 9 (note 1)

And we know that g(f(1/2)) = 2

And we know that f(1/2) = 1/2(a) - b

So g(1/2(a) - b) = 2

Meaning that 1/2(a) - b + 4 = 2

So 1/2(a) - b = - 2 (note 2)

Using note 1 and 2 we can solve the equation

11/2(a) = 11 so a = 2 and b = 3

5 0

3 years ago