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3 years ago

Find the solution to the system 4x - y = -12 and -x - y = 3

Mathematics

2 answers:

RoseWind [281]3 years ago

7 0

Answer:

x = -3

y = 0

Step-by-step explanation:

4x - y = -12

-x - y = 3

__________--

5x = -15

x = -15/5

x = -3

-x - y = 3

-(-3) - y = 3

3 - y = 3

-y = 3 - 3

y = 0

rjkz [21]3 years ago

6 0

Answer:

Equation Form : x=-3 y =0

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3 years ago

-5 1/2 - 4 1/4 + 6 3/4

ruslelena [56]

Answer:

-3

Hope this helps :)

Have a great day !

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Step-by-step explanation:

$-5\frac{1}{2} - 4\frac{1}{4} +6 \frac{3}{4} = -5\frac{2}{4} - 4\frac{1}{4} +6 \frac{3}{4} = -9\frac{3}{4} +6\frac{3}{4}=-3$

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3 years ago

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PolarNik [594]

Answer:

The answer is 4a

Step-by-step explanation:

1) Simplify 4a² + 12a² to 16a².

$\sqrt{ {16a}^{2} }$

2) Use this rule:

$\sqrt{ab} = \sqrt{a} \sqrt{b}$

$\sqrt{16} \sqrt{ {a}^{2} }$

3) Since 4 × 4 is 16, the square root of 16 is 4.

$4 \sqrt{ {a}^{2} }$

4) Simplify.

$4a$

Therefor, the answer is 4a.

8 0

3 years ago

A. f(x)=1/x+4 b.f(x)=1/x-4 c.f(x)=1/x+4 d.f(x)=1/x-4

romanna [79]

Answer:

The correct answer is c. f(x) = 1/(x + 4)

Step-by-step explanation:

We can tell this because as the bottom of the equation (x + 4) approaches 0, the equation gets larger and larger.

Also, you can note that -4 is a asymptote, which can only be from the bottom of the equation being equal to 0. This is only true in option c.

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3 years ago