All categories

2 years ago

Somebody pls help I’m doin a exam!!!!

Mathematics

2 answers:

Lynna [10]2 years ago

8 0

Answer:

x=2

y= -3

Step-by-step explanation:

3x+2y=0 2y=-3x, y=-3x/2

3x-15y=51

substitute y

3x-15(-3x/2)=51

3x+45x/2=51

multiply by 2

6x+45x=102

51x=102

x=2

y= -3

gregori [183]2 years ago

6 0

Answer:

x=2

y=-3

Step-by-step explanation:

Ok so....

Since this problem is practically set up all you have to do is solve it! So what i did was try to cancel both of the x's so that I am just left with the y. I subtract everything and end up with

17y = -51

Now, all you have to do is divide giving you the answer for y which is

y = -3

Next, you have to plug in the value of y to either the first equation or second equation in the question. I chose the first equation and once I plugged it in it looked like this.

3x - 6 = 0

Now, add 6 to both sides giving you

3x = 6

Now all you have to do is divide

x = 2

TAADAA!!!

If you want to check your answer if you're unsure just plug in both values to either the first equation or second equation in the original problem. Okay well have a good day!! :D

You might be interested in

Rewrite the expression 14m-(5+8m) without parentheses

JulijaS [17]

Answer:

14m-5-8m

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers

on a scale drawing, 5 metres is represented by 4 centimetres. write the scale as a ratio in it's simplest form.

ryzh [129]

Answer:

<em>The scale factor is 1:125</em>

Step-by-step explanation:

<u>Scaling</u>

Objects can be represented in a reduced or augmented size by using scaling which consists of multiplying or dividing by a constant factor. We use scaling when representing geographic locations on a map.

On a scale drawing, a distance of 5 meters = 500 cm is represented by 4 centimeters. The scale factor is usually represented as a ratio of the smallest to the biggest magnitude:

$\frac{4}{500}=\frac{1}{125}$

The scale factor is 1:125

8 0

3 years ago

What is the value of x?<br> Enter your answer in the box

Gre4nikov [31]

The horizontal value in a pair of coordinates: how far along the point is. The X Coordinate is always written first in an ordered pair of coordinates (x,y), such as (12,5). In this example, the value "12" is the X Coordinate. Also called "Abscissa" See: Coordinates.

5 0

3 years ago

Brainly trash finish your own homework by yourself

Gennadij [26K]

Answer:

hahahahahahaa that's truly

6 0

2 years ago

Read 2 more answers

A rectangular prism had a volume of 252 cubic centimeters. The length of the prism is 14 centimeters and the width of the prism

mojhsa [17]

<h2>Answer:</h2>

A prism is a solid object having two identical bases, hence the same cross section along the length. Prism are called after the name of their base. A rectangular prism is a solid whose base is a rectangle. Multiplying the three dimensions of a rectangular prism: length, width and height, gives us the volume of a prism:

$V=L\times W\times H$

FOR THE ORIGINAL PRISM WE HAVE THE FOLLOWING DIMENSIONS:

$L=14cm \\ \\ W=6cm \\ \\ H=3cm$

In fact, the volume is $252cm^3$ because:

$V=14\times 6\times 3 \therefore V=252cm^3$

Now the height of the prism was changed from 3 centimeters to 6 centimeters to create a new rectangular prism, therefore:

FOR THE NEW PRISM WE HAVE THE FOLLOWING DIMENSIONS:

$L=14cm \\ \\ W=6cm \\ \\ H=6cm$

So the new volume is:

$V=14\times 6\times 6 \therefore V=504cm^3$

<h3><em>What do we know about the volume of the new prism?</em></h3>

<em>Well, the volume has increased from </em> $252cm^3 \ to \ 504cm^3$ <em>and since</em> $504=2\times 252$ <em>we can say that the new volume is two times the original volume.</em>

8 0

2 years ago