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3 years ago

Work out the value of 2x-2y when x-y=3

Mathematics

1 answer:

timurjin [86]3 years ago

5 0

Answer:

Step-by-step explanation:

x-y=3

then 2×(x-y)=2×3

then

2x-2y = 6

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**GIVING OUT BRAINLIEST**

IgorLugansk [536]

Answer:

1ST GRAPH

Step-by-step explanation:

1st GRAPH

Because the equation is trying to express:

<u>p is bigger or equal to -1</u>

and in graph no.1 the inequality is at -1 and everything after it could be p. As P is bigger than -1

7 0

3 years ago

Use a calculator to evaluate the formula for x equals 639 round to the nearest hundredth if needed

Ket [755]

233.97

Hope this helps!!!

8 0

3 years ago

Find the equation of the line through the points (0, –3) and (4, 5)

vekshin1

Answer:

y=2x-3

Step-by-step explanation:

Hi there!

We are given the points (0, –3) and (4, 5)

We want to find the equation of the line between these points

There are 3 ways to write the equation of the line, yet the most common way is slope-intercept form, which is y=mx+b, where m is the slope and b is the y intercept

To write the equation of the line in this way, we need to first find the slope of the line
The slope can be found using the formula $\frac{y_2-y_1}{x_2-x_1}$ , where $(x_1, y_1)$ and $(x_2, y_2)$ are points

We already have 2 points, but let's label their values to avoid confusion and mistakes when calculating.

m= $\frac{y_2-y_1}{x_2-x_1}$

m= $\frac{5--3}{4-0}$

Simplify

m= $\frac{5+3}{4-0}$

m= $\frac{8}{4}$

Divide

m=2

We found the slope of the line.

Here is the equation of the line so far:

y=2x+b

Now let's find b

As stated before, b is the y intercept of the line, which is the point where the line passes through the y axis; the value of x at the y intercept is 0

One of the points we were given (0, -3) is actually the y intercept of the line!

The value of b is the value of y at the y intercept; in this case, b is equal to -3

Now substitute -3 as b in the equation.

y=2x-3

Hope this helps!

See more on this topic here: brainly.com/question/27172025

5 0

2 years ago

What is 7 x 4 pleez i nid help

rewona [7]

Answer: 28

Step-by-step explanation:

5 0

3 years ago

Please help with the following question:

Artist 52 [7]

Using it's concept, the probabilities are given as follows:

a) Type A die and orange: 1/10 = 0.1.

b) Blue: 23/30

c) Type B, if blue: 8/23.

<h3>What is a probability?</h3>

A probability is calculated as the <u>number of desired outcomes in the experiment divided by the number of total outcomes in the experiment</u>.

For item a, the probability that a type A dice is chosen is:

3/5.

As there are 5 dices, 3 of type A and 2 of type B.

The probability that a type A dice comes up orange is:

1/6.

As it has six faces, one of which is orange.

Then the probability of an orange type A dice being chosen is:

3/5 x 1/6 = 1/10 = 0.1.

For item b, the probability of blue is divided as follows:

5/6 of 3/5 -> type A.

4/6 of 2/5 -> type B.

Hence the probability of a blue dice is:

p = 5/6 x 3/5 + 4/6 x 2/5 = 23/30

For item c, we apply the conditional probability, hence the probability is given as follows:

p = (4/6 x 2/5)/(23/30) = (8/30)/(23/30) = 8/23.

Dividing the probabilities of type B and blue by the probability of blue.

More can be learned about probabilities at brainly.com/question/14398287

#SPJ1

7 0

1 year ago