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3 years ago

Question #4

Mathematics

1 answer:

zheka24 [161]3 years ago

6 0

Answer:

y = -4/5x + 2 & y = -2/7x - 4/7

Step-by-step explanation:

(4x) - 5y = -10 (2x) - 7y = 4

Move 4x on the same side as -10 Move 2x on the same side as 4

-5y = 4x -10 -7y = 2x + 4

Divide -5 to both sides Divide -7 by both sides

That should isolate the y for both equations.

4x/-5 = -4/5x....-10/-5 = 2 2x/-7 = -2/7x....4/-7 = -4/7

y = -4/5x + 2 y = -2/7x - 4/7

If that wasn't the answer to your question, I'm sorry.

But if it did, then your welcome.

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How many terms are In This expression 7+10b

jenyasd209 [6]

Answer:

one term is in this expression

Step-by-step explanation:

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3 years ago

HELP 1x3 divided by 56 then multiply that by 9

Sloan [31]

Answer:

0.48

Step-by-step explanation:

1x3/56 then multiply it by 9

1x3 is 3

3 x 9 = 27

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4 years ago

Evaluate 2/ 3 ÷ 4 /5 Give your answer as a fraction in its simplest form.

gulaghasi [49]

Step-by-step explanation:

Our problem:

$\frac{2}{3} \div \frac{4}{5} = unknown$

How to solve?

Find the reciprocal (opposite) of 4/5, then multiply. Simplify if necessary.

Find the reciprocal:

$\frac{2}{3} \times \frac{5}{4} = unknown$

Multiply:

$\frac{2}{3} \times \frac{5}{4} = \frac{10}{12}$

Simplify:

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3 years ago

Sin(20)=x/670 ????????

mash [69]

Answer:

229.2

Step-by-step explanation:

Remark

There's a lot in this question. The x is not just any x. It is defined and limited by its relationship with the sine function.

The Sin is defined as Opposite over Hypotenuse in a right triangle. The 670 is the Hypotenuse. You know that by the definition of Sine.

So one thing you should always keep in mind: the x because of where it is in the definition, will always be smaller than the Hypotenuse. So you should get a value less than 670.

Formula

Just as you have it

Sin(20) = x / 670

Solution

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670 * sin(20) = x

sin(20) = 0.3420

x = 670 * 0.3420

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6 0

3 years ago

Find the perimeter of the window to the nearest hundredth. also how do you do it?

k0ka [10]

I am assuming the picture is of a stained glass window in the shape of a semicircle.

Answer: 7.71 feet.

Step-by-step explanation: The formula for finding the circumference of a circle is $\frac{1}{2}$ π × d + d.

The diameter is 3 feet. Substitute this into the equation:

$\frac{1}{2}$ π × 3 + 3.

Solve -

3.14 × 3 = 9.42

$\frac{1}{2}$ of 9.42 = 4.71

4.71+3 = 7.71

Round -

The answer is already rounded.

Hope this helped!~

6 0

4 years ago