All categories

3 years ago

My REAL FINAL LAST 100 points, pls do me well this time... show work pls :(

Mathematics

1 answer:

lutik1710 [3]3 years ago

7 0

Im not sure how to explain how to do a graph, but I hope this helps at least a bit!

~Direct Variation When two variables are related in such a way that the ratio of their values always remains the same, the two variables are said to be in direct variation. In simpler terms, that means if A is always twice as much as B, then they directly vary. If a gallon of milk costs $3, and I buy 1 gallon, the total cost is $3.~

You might be interested in

Photo: nih jj jj in in India jj I’m innings)ciedjndjneiidjncjeieie jnrfnj donjon rfnjrfnr

elixir [45]

Your answer is D hope this helps!!

7 0

3 years ago

Read 2 more answers

Really need help on this guys!

Sergio039 [100]

<h2>Hello!</h2>

The answer is:

The center of the circle is the point (-9,-2) and the circle has a radius of 6 units.

To solve the problem, we need to use the given equation which is in the general form, and then, use it transform it to the standard form in order to find the center of the circle and its radius.

So,

We are given the circle:

$x^{2}+y^{2}+18x+4y+49=0$

We know that a circle can be written in the following form:

$(x-h)^{2}+(y-k)^{2}=r^{2}$

Where,

h is the x-coordinate of the center of the circle

k is the y-coordinate of the center of the circle

r is the radius of the circle.

So, to find the center and the radius, we need to perform the following steps:

- Moving the constant to the other side of the equation:

$x^{2}+y^{2}+18x+4y=-49$

- Grouping the terms (x and y):

$x^{2}+18x+y^{2}+4y=-49$

- Completing squares for both variables, we have:

We need to sum to each side of the equation the following term:

$(\frac{b}{2})^{2}$

Where, b, for this case, will the coefficients for both terms that have linear variables (x and y)

So, the variable "x", we have:

$x^{2} +18x$

Where,

$b=18$

Then,

$(\frac{18}{2})^{2}=(9)^{2}=81$

So, we need to add the number 81 to each side of the circle equation.

Now, for the variable "y", we have:

$y^{2} +4y$

Where,

$b=4$

$(\frac{4}{2})^{2}=(2)^{2}=4$

So, we need to add the number 4 to each side of the circle equation.

Therefore, we have:

$(x^{2}+18x+81)+(y^{2}+4y+4)=-49+81+4$

Then, factoring, we have that the expression will be:

$(x+9)^{2}+(y+2)^{2}=36$

- Writing the standard form of the circle:

Now, from the simplified expression (after factoring), we can write the circle in the standard form:

$(x+9)^{2}+(y+2)^{2}=36$

Is also equal to:

$(x-(-9))^{2}+(y-(-2))^{2}=36$

Where,

$h=-9\\k=-2\\r=\sqrt{36}=6$

Hence, the center of the circle is the point (-9,-2) and the circle has a radius of 6 units.

Have a nice day!

4 0

4 years ago

Help Will give Branliest

Monica [59]

They Y intercept is 1

5 0

2 years ago

PLEASE HELP!!!<br> Equations Sort and Equivalent Expressions

Alex73 [517]

Answer:

Step-by-step explanation:

Math Matching games:

5(5x + 2)

5(5x) + 5(2)

25x + 10 <== answer

2(x + 4)

2(x) + 2(4)

2x + 8 <== answer

3(4x - 9)

3(4x) - 3(9)

12x - 27 <== answer

7(2x + 3)

7(2x) + 7(3)

14x + 21 <== answer

4(3x - 5)

4(3x) - 4(5)

12x - 20 <== answer

6(5x + 1)

6(5x) + 6(1)

30x + 6 <== answer

8(x - 5)

8(x) - 8(5)

8x - 40 <== answer

5(4x - 3)

5(4x) - 5(3)

20x - 15 <== answer

2(2x + 7)

2(2x) + 2(7)

4x + 14 <== answer

3(3x + 3)

3(3x) + 3(3)

9x + 9 <== answer

7(5x - 2)

7(5x) - 7(2)

35x - 14 <== answer

4(x - 8)

4(x) - 4(8)

4x - 32 <== answer

True or false Part 1:

A. 3x + 3 = 3(x + 1) <== true

B. 2x + 2x + 4 = 8x <== false

C. 3x + 3 = 2x + x + 3 <== true

D. 2x + 2x + 4 = 2(x + 1) <== false

E. 5x + 6 = 3x + 3x <== false

F. 3x + 3 = 3(x + 3) <== false

G. 2x + 2x + 4 = 4(x + 1) <== true

H. 4x + 3 = 3x + 4 <== false

I. 8 + 2x + 4x = 14 <== false

J. 4x + 4 = 3x + x + 2 + 2 <== true

K. 3x + 2x + 4 = 3x + 2(x + 2) <== true

L. 6x + 2x = 3x + 5x <== true

M. 8x = 8 + x <== false

N. 8x = x + x + x + 5x <== true

True or false Part 2:

I. 8 + 2x + 4x = 14 <== false

J. 4x + 4 = 3x + x + 2 + 2 <== true

K. 3x + 2x + 4 = 3x + 2(x + 2) <== true

L. 6x + 2x = 3x + 5x <== true

M. 8x = 8 + x <== false

N. 8x = x + x + x + 5x <== true

O. $x^2+3x=3x+x^2\ < ==\ true$

P. $2x^2+3=2+x^2+x^2+1\ < ==\ true$

Hope this helps!

4 0

2 years ago

Sanjay and felipe are putting together a 500-piece puzzle. sanjay could do the entire puzzle by himself in 6 hours, while it wou

lisov135 [29]

Sanjay and Felipe would take a time of 3.4 hours to do the puzzle if they were working together.

Time can be described in mathematics as an ongoing and continuous series of events that take place one after another, from the past through the present and into the future.

The amount of time that something exists or continues to happen as measured or measurable.

The duration of events or the gaps between them can be measured, compared, or even ordered using time.

Time taken by Sanjay= 6 hours

Time taken by Felipe= 8 hours

Time taken by both if they work together,

= $\frac{1}{1/6+1/8}$

= $\frac{1}{\frac{4+3}{24} }$

=24/7

=3.4 hours

Learn more about time here:

brainly.com/question/2854969

#SPJ4

3 0

3 years ago