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qwelly [4]
3 years ago
9

PLEASE HELP ME SOLVE THIS PROBLEM ASAP

Mathematics
1 answer:
Ksivusya [100]3 years ago
4 0

Answer:

r = 1

Step-by-step explanation:

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Pls help with these math problems
katrin2010 [14]

Answer:

Step-by-step explanation:

1)

First we add what we know for y into the second equation.

5x - 4(x +2)= -3

From there, we simplify it

5x-4x-8= -3

x-8=-3

Now we get the x on its own

x=5

and now we add x=5 into the first equation that we had and simplify to find y

y=5+2

y=7

So the answer is x=5, y=7 or (5,7)

2)

For this one we do the same thing as with 1.

Add what we know for y (bottom equation) to the top equation

3x-8(x-8)=24

Now we simplify

3x-8x+64=24

-5x+64=24

And now solve for X

-5x=-40

x=8

And then substitute x=8 to find y

y=8=8

y=0

So the answer is x=8, y=0 or (8,0)

5 0
3 years ago
An 5kg object is 6 meters what is the potential energy
AVprozaik [17]

Potential Energy of an object of 5kg which is 6 meters in height is 294 Joules.

Step-by-step explanation:

We are given:

Mass = m = 5 kg

Height = h= 6 meters

Potential Energy = ?

The formula used to find Potential Energy is:

Potential\,\,Energy =mgh

where m is mass, g is gravitational field and h is height

Putting the given values of mass and height, and g=9.8 m/s^2

Potential Energy = 5*9.8*6\\Potential Energy = 294 Joules

So, Potential Energy of an object of 5kg which is 6 meters in height is 294 Joules.

Keywords: Potential Energy

Learn more about Potential Energy at:

  • brainly.com/question/6013189
  • brainly.com/question/9251988
  • brainly.com/question/1198647

#learnwithBrainly

3 0
3 years ago
Can someone help please
Pepsi [2]

Answer:

A: 5

B: 6

C: 3x^2 - 2x

D: 8

E: 22

Step-by-step explanation:

A: (-1)^2 + 4 = 5

B: (-4)^2 +4 = 16

2 x (-3) -4 = -10,

16-10=6

C: 3(x^2 + 4) = 3x^2 + 12

3x^2 + 12 -2x -4, simplify

3x^2 - 2x

D: g(3) = 2*3 -4 = 2

f(2) = 2^2 +4 = 8

E:  f(3) = 3^2 + 4 = 13

g(13) = 2*13 - 4 = 22

6 0
3 years ago
The average car length is 200 inches. how many feet and inches is the average car
telo118 [61]
So there are 12 inches in a foot. What to do:
1) divide 200 by 12 which is roughly 16.6666 repeating
2) now we know that the average car length is at least 16 feet, but less than 17
3) What I do now, is I take 12 and multiply it by 16 
12 x 16 = 192
4) 200-192 = 8
5) 16 feet and 8 inches is the answer
5 0
3 years ago
Read 2 more answers
You have 108 feet of fencing to enclose a rectangular plot that borders on a river. If you do not fence the side along the River
Licemer1 [7]

Answer:

The length and width of the plot that will maximize the area of the rectangular plot are 54 ft and 27 ft respectively.

Step-by-step explanation:

Given that,

The length of fencing of the rectangular plot is = 108 ft.

Let the longer side of the rectangular plot be x which is also the side along the river side and the width of the rectangular plot be y.

Since the fence along the river does not need.

So the total perimeter of the rectangle is =2(x+y) -x

                                                                    =2x+2y-y

                                                                    =x+2y

So,

x+2y =108

⇒x=108 -2y

Then the area of the rectangle plot is A = xy

A=xy

⇒A= (108-2y)y

⇒ A = 108y-2y²

A = 108y-2y²

Differentiating with respect to x

A'= 108 -4y

Again differentiating with respect to x

A''= -4

For maximum or minimum, A'=0

108 -4y=0

⇒4y=108

\Rightarrow y=\frac{108}{4}

⇒y=27.

A''|_{y=27}=-4

Since at y= 27, A''<0

So, at y=27 ft , the area of the rectangular plot maximum.

Then x= (108-2.27)

          =54 ft.

The length and width of the plot that will maximize the area of the rectangular plot are 54 ft and 27 ft respectively.                                                              

3 0
3 years ago
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