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3 years ago

How would you graph 4x-7y=28 ?

Mathematics

2 answers:

andrezito [222]3 years ago

7 0

Answer:

y = 4/7x - 4

Step-by-step explanation:

You first have to put it in y = mx + b form

So, we first subtract 4x from both sides: -7y = -4x + 28

Divide both sides by -7

y = 4/7x - 4

Now to graph you have to start at the starting point which is -4

So we start with our point on -4 then move up 4 times and 7 times to the left. Mark the points then draw your line!

julsineya [31]3 years ago

4 0

First solve the equation for y

Subtract 4x from both sides of the equation.
-7y=28-4x
Divide each term by -7and simplify.
y=-4+4x/7

Then graph the line using the slope and y-intercept

Slope: 4/7

Y-intercept: -4

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Johanna, Elizabeth, and Dan are preparing a chemical solution for a research project. When

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Using the together rate, it is found that they would prepare the solution in 1.71 minutes working together.

<h3>What is the together rate?</h3>

It is the sum of each separate rate.

In this problem, the rates are given by:

Johanna's: 1/6.

Elizabeth's: 1/6.

Dan's: 1/4.

Hence the together rate is given by:

$\frac{1}{x} = \frac{1}{6} + \frac{1}{6} + \frac{1}{4}$

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x = 1.71.

They would prepare the solution in 1.71 minutes working together.

More can be learned about the together rate at brainly.com/question/25159431

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2 years ago

Can someone explain this to me please?

Alex Ar [27]

Answer:

Option C

Step-by-step explanation:

Since, measure of all sides of the triangle has been given in the picture,

By applying cosine rule in the given triangle,

AC² = AB² + BC² - 2(AB)(BC)cos(B)

11² = 16² + 16² - 2(16)(16)cos(B)

121 = 256 + 256 - 512.cos(B)

121 - 512 = - 512.cos(B)

cos(B) = $\frac{391}{512}$ = 0.763672

B = $cos^{-1}(0.763672)$

B = 40.2°

Therefore, measure of angle B is 40.2°.

Option C is the answer.

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3 years ago

The length of a rectangle is three meters less than twice its width. If the perimeter of the rectangle is 66 meters, find its di

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Answer:

assume it's width as 'x'

So, it's length is '2x-3'

and the perimeter is equal to 66m

Step-by-step explanation:

So,equalize the equation

x + (2x-3) + x + (2x-3) = 66

remove the brackets

2x + 4x - 6 = 66

add 6 to both sides

6x = 60

x = 60 ÷ 6

= 10

so, the length is 2x-3 = 20 - 3 = 17 m

and the breadth is x = 10 m

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Answer:

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