What is the LCM of 9 and 18

Answer:

x=3 and y=2

Step-by-step explanation:

Rewrite equations:

3x−y=7;2x+y=8

Step: Solve3x−y=7for y:

3x−y=7

3x−y+−3x=7+−3x(Add -3x to both sides)

−y=−3x+7

−y

−1

=

−3x+7

−1

(Divide both sides by -1)

y=3x−7

Step: Substitute 3x−7 for y in 2x+y=8:

2x+y=8

2x+3x−7=8

5x−7=8 (Simplify both sides of the equation)

5x−7+7=8+7 (Add 7 to both sides)

5x=15

5x5

=

15/5

(Divide both sides by 5)

x=3

Step: Substitute 3 for x in y=3x−7:

y=3x−7

y=(3)(3)−7

y=2(Simplify both sides of the equation)

Answer:

-8p-14

Step-by-step explanation:

Answer:

3. {-2, 3/2}

Step-by-step explanation:

[tex]\mathrm{Solve\;with\;the\;quadratic\;formula}[/tex]

[tex]x_{1,\:2}=\frac{-1\pm \sqrt{1^2-4\cdot \:2\left(-6\right)}}{2\cdot \:2}[/tex]

[tex]\sqrt{a^1-4*2(-6)=7}[/tex]

[tex]x_{1,\:2}=\frac{-1\pm \:7}{2\cdot \:2}[/tex]

[tex]\mathrm{Separate\:the\:solutions}[/tex]

[tex]x_1=\frac{-1+7}{2\cdot \:2},\:x_2=\frac{-1-7}{2\cdot \:2}[/tex]

[tex]x=\frac{-1+7}{2*2}:\frac{3}{2}[/tex]

[tex]x=\frac{-1+7}{2*2}:-2[/tex]

[tex]\mathrm{The\:solutions\:to\:the\:quadratic\:equation\:are:}[/tex]

[tex]x=\frac{3}{2},\:x=-2[/tex]

~Learn with Lenvy~

Answer:

Step-by-step explanation:

answer- {-2, 3/2}

steps are in the image.

Answer:

[tex]\begin{bmatrix}\mathrm{Solution:}\:&\:x\ge \frac{20}{23}\:\\ \:\mathrm{Decimal:}&\:x\ge \:0.86956\dots \\ \:\mathrm{Interval\:Notation:}&\:[\frac{20}{23},\:\infty \:)\end{bmatrix}[/tex]

Step-by-step explanation:

[tex]-\frac{2}{3}\left(2x-\frac{1}{2}\right)\le \frac{1}{5}x-1[/tex]

Expand [tex]-\frac{2}{3}\left(2x-\frac{1}{2}\right)\le \frac{1}{5}x-1[/tex] [tex]-\frac{4}{3}x+\frac{1}{3}[/tex]

[tex]-\frac{4}{3}x+\frac{1}{3}\le \frac{1}{5}x-1[/tex]

[tex]\mathrm{Subtract\:}\frac{1}{3}\mathrm{\:from\:both\:sides}[/tex]

[tex]-\frac{4}{3}x+\frac{1}{3}-\frac{1}{3}\le \frac{1}{5}x-1-\frac{1}{3}[/tex]

[tex]Simplify[/tex]

[tex]-\frac{4}{3}x\le \:-\frac{4}{3}+\frac{1}{5}x[/tex]

[tex]\mathrm{Subtract\:}\frac{1}{5}x\mathrm{\:from\:both\:sides}[/tex]

[tex]-\frac{4}{3}x-\frac{1}{5}x\le \:-\frac{4}{3}+\frac{1}{5}x-\frac{1}{5}x[/tex]

[tex]Simplify[/tex]

[tex]-\frac{23}{15}x\le \:-\frac{4}{3}[/tex]

[tex]\mathrm{Multiply\:both\:sides\:by\:-1\:\left(reverse\:the\:inequality\right)}[/tex]

[tex]\left(-\frac{23}{15}x\right)\left(-1\right)\ge \left(-\frac{4}{3}\right)\left(-1\right)[/tex]

[tex]\mathrm{Simplify}[/tex]

[tex]\frac{23}{15}x\ge \frac{4}{3}[/tex]

[tex]\mathrm{Multiply\:both\:sides\:by\:}15[/tex]

[tex]15\cdot \frac{23}{15}x\ge \frac{4\cdot \:15}{3}[/tex]

[tex]Simplify[/tex]

[tex]23x\ge \:20[/tex]

[tex]\mathrm{Divide\:both\:sides\:by\:}23[/tex]

[tex]\frac{23x}{23}\ge \frac{20}{23}[/tex]

[tex]\mathrm{Simplify}[/tex]

Hence the final answer is [tex]\begin{bmatrix}\mathrm{Solution:}\:&\:x\ge \frac{20}{23}\:\\ \:\mathrm{Decimal:}&\:x\ge \:0.86956\dots \\ \:\mathrm{Interval\:Notation:}&\:[\frac{20}{23},\:\infty \:)\end{bmatrix}[/tex]

Answer:

Step-by-step explanation:

First Add the scores.

Score Total = 787 + 615 + 550 + 674 + 784+ 773 + 620 + 720 + 704

Score Total = 6227

Now divide by the number of members of the sum.

Number of members = 9

The average score = Total Score / number of members

The average score = 6227 / 9 = 691.9

The average score = 692 which is C

Answer:

3y = -x + 17

Step-by-step explanation:

Equation of a line is in the form:

y = mx + c

where m is slope and c is intercept

Mathematically;

slope m = (y2-y1)/(x2-x1)

= (6-4)/(-1-5) = 2/-6 = -1/3

So the equation is now;

y = -x/3 + c

Multiply through by 3

3y = -x + 3c

To get c substitute the value of a point say (5,4)

x = 5 and y = 4

3(4) = -5 + 3c

12 = -5 + 3c

12+ 5 = 3c

3c = 17

c = 17/3

So the equation is

y = -x/3 + 17/3

and that is

3y = -x + 17

Answer:1

Step-by-step explanation:

1. 3, 4, 5

2. 5, 12, 13

3. 7, 24, 25

4. 8, 15, 17

5. 9, 40, 41

6. 11, 60, 61

And so on...

Answer:

6 sides, hexagon

Step-by-step explanation:

If you count the sides you see there are 6, and 6 sided figures are hexagons.

Answer:

- 1/9

Step-by-step explanation:

- ( 3 ^ -5) ( 3 ^3)

We know that a^ b* a^c = a^ ( b+c)

- ( 3^(-5+3))

-( 3 ^ (-2))

We know that a^ -b = 1/a^b

- ( 1/ 3^2)

- 1/9

Answer:

- 1/9

Step-by-step explanation:

stop deleting my answer Brainly :) its right

Answer:

D. No, because it fails the vertical line test

Step-by-step explanation:

A function can only have 1 output for each input. If you are able to draw a vertical line and it touches the graph twice, then it has failed the vertical line test and is therefore not a function.

Hope this helps~! Brainliest is appreciated if it does!

Answer:

Total cost is $17.40

Step-by-step explanation:

First..

what is 20%

20/100 = .2 or calculator

Then

Add. .20 ×14.50

you will get 2.9

Final

Add 2.9 + $14.50

= $17.40

Answer:

Step-by-step explanation:

1:    x^2 + 6x = - 7

2:   x^2 + 6x + (6/2)^2 = -7 + (6/2)^2

2:   x^2 + 6x + 9 = - 7 + 9    This might be a 2

2:   x^2 + 6x + 9 = 2

3:   (x + 3)^2 = 2

4:   √(x + 3)^2 = √2  

5:    x + 3 = +/- √2

6:    x = -3 +/- √2

Answer:

none

Step-by-step explanation:

Kayla is buying an $18.90 shirt for $10, she is underpaying $8.90.

Therefore, she needs to pay another $8.90 to pay for the full price of the shirt.

Unless there was a discount on the shirt, this answer makes the most sense to me.

Answer:

32%

Step-by-step explanation:

Answer:

6in

Step-by-step explanation:

Let's organize what we know.

- 5gal/1in

- 30gal tank

Since we need to find the inches of the fish he can have, we can set up a proportion like this:

5/1=30/x

We can cross multiply.

5x=1(30)

Simplify: 1*30=30

5x=30

Now we can isolate the variable.

5x=30

/5   /5

x=6

One key difference between anorexia nervosa and bulimia is the type of nocive relationship patients with these disorders have with food.

These two are eating disorders, which means they are diseases that involve nocive or abnormal relationships with food.

Learn more about anorexia in: https://brainly.com/question/2681827

Answer:

No

Step-by-step explanation:

This time I did the work on paper lol

Answer:

... there's nothing there. you forgot to attach something i believe

Step-by-step explanation:

Answer:

8y

Step-by-step explanation:

=(6)(2x)+(6)(y)+2y+−12x

=12x+6y+2y+−12x

Combine Like Terms:

=12x+6y+2y+−12x

=(12x+−12x)+(6y+2y)

=8y

Answer:

8y

Step-by-step explanation:

6(2x+y) comes first 12x+6y then you take 2y and add it from 6y giving you 8y and that gives you the most simplified answer 12x and -12x cancel each other out

Answer:

See below.

Step-by-step explanation:

y=2x+3

-----

y=2(-2)+3

y=-4+3

y=-1

y=2(-1)+3

y=-2+3

y=1

y=2(0)+3

y=0+3

y=3

y=2(1)+3

y=2+3

y=5

y=2(2)+3

y=4+3

y=7

-hope it helps

Answer:

x= 9

Step-by-step explanation:

i got 9 by subtracting 54-45 and got 9 therefore x=9

The equation for a parabola does become [tex]\rm x^2=4py[/tex].

A symmetrical open plane curve formed by the intersection of a cone with a plane parallel to its side. The path of a projectile under the influence of gravity follows a curve of this shape.

Given

The derivation for the equation of a parabola with a vertex at the oriin.

The equation of the parabola can be written as;

[tex]\rm (x)^2 + (y - p)^2 = (0)2 + (y + p)2\\\\x^2 + y^2 - 2py + p^2 = y^2 + 2py + p^2\\\\ x^2= 2py+2py\\ \rm \\x^2=4py[/tex]

Hence, the equation for a parabola does become [tex]\rm x^2=4py[/tex].

To know more about parabola click the link given below.

https://brainly.com/question/3719015

Answer:

385/27

Step-by-step explanation:

Answer:

The answer is 3/8.

Step-by-step explanation:

I watched it on khan academy. im just unsure how to explain it. Lol but im 100% sure it is 3/8. Have a nice day hope this helped! :3

Answer:

P(1 red gumball and 1 blue balloon) =[tex]\frac{2}{15}[/tex]

Step-by-step explanation:

There are two jars.

One jar has 2  red, 3 green and 1 yellow gumball.So, there are 2+3+1=6 gumballs.

Another jar has 2 blue and 3 purple balloons. Totally there are 2+3=5 balloons.

So,

Probability of drawing 1 red gumball from jar 1 =[tex]\frac{2}{6}[/tex]

Probability of drawing 1 blue balloon =[tex]\frac{2}{5}[/tex]

So, P( 1 red gumball, 1  blue balloon)= [tex]\frac{2}{6} *\frac{2}{5} =\frac{2}{15}[/tex]

Answer:

252 cph

Step-by-step explanation:

756 divide by 3 is 252

Answer:252

Step-by-step explanation:

Answer:

x = 2 + √10

    -------------

           3

x =  2 - √10

     ------------

            3

Step-by-step explanation:

3x² - 3x - 1 = x + 1

         -x - 1  -x  -  1

3x² - 4x - 2 = 0

-b +/- √b² - 4ac              -(-4) +/- √(-4)² - 4(3)(-2)         4 +/- √16 + 24

         ------------------    =            ----------------             =   -----------------

               2a                                 2(3)                                  6

4+/-√40        4 + √ 4 × 10         4 +2√10         2 + √10

------------  =      -------------     =     ------------    =   ------------

     6                       6                        6                  3

                     4 - √ 4 × 10           4 - 2√ 10           2 - √10

                      ----------------    =   -----------------   =    ---------------

                               6                         6                        3

I hope this helps!