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2 years ago

Simplify: 2(xy - 7) = [?] x = -1 and y = 3

Mathematics

1 answer:

fiasKO [112]2 years ago

5 0

Answer:2(xy-7)= -20

Step-by-step explanation:

Plug in -1 for x and 3 for 3, as the question says that x and y represent those values.

2(xy-7) = ?

2((-1)(3) - 7) = ?

2(-3-7)=?

2(-10)

-20

2(xy - 7) = -20

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What is root 3 × 2 root 3

Nezavi [6.7K]

Answer:

Step-by-step explanation:

The principal, real, root of:

$\sqrt[2]{3}$

=1.73205081

All roots:

1.73205081

−1.73205081

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3 years ago

How do i Solve: 3x2−6x−12=0 ?

MrMuchimi

Answer:

1 + root 5, 1 - root 5

Step-by-step explanation:

I assume you mean 3x^2-6x-12=0.

First, note that you can divide both sides by 3. You get:

x^2-2x-4=0

Use the quadratic equation.

$x=\frac{2\pm\sqrt{4+16}}{2}=\frac{2\pm2\sqrt{5}}{2}=1\pm\sqrt{5}$

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2 years ago

Please help me. will mark brainliest. what is the answer?

VARVARA [1.3K]

Answer:

A ) y=-1/2x+2

Step-by-step explanation:

since the equation is y=2x+4 and the points are (-2,3) and the line is perpendicular to that equation

y=-1/2x+b

enter the point (-2,3)

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3 years ago

Write .139 as a percent.

Rama09 [41]

Answer:

13.9%

Step-by-step explanation:

0.139 x 100=13.9, can you give me brainiest if its correct

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2 years ago

Read 2 more answers

A square park has an area of 6561 square meters. If you walk around the park what is the distance that you would have walked?

Paraphin [41]

First we have to find length of 1 side of the square. We can use formula for area of the square. A=a*a ==> $A=a^2$ where a is length of the side.
From this formula we can find
$a= \sqrt{A}$
a= $\sqrt{6561} =81 - 1 side$
Now we just have to multiply it by 4, because there are 4 sides.
81*4=324 - its the answer

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2 years ago