Write 3x as a numerical expression

Answer:

the first one (:

Step-by-step explanation:

Answer:

28

Step-by-step explanation:

-2+9 (4)=7(4)=28

Answer:

Courtney is bringing 8 snacks

Step-by-step explanation:

Chelsea's snacks are represented as 2x.

2x means 2 · (a number)

If Chelsea brought 16 snacks and the amount of snacks represented by 2x, we have to figure out what times 2 equals 16.

In order to find out, we have to divide.

16 ÷ 8 = 2

This means 2 · 8 = 16

Since the amount of snacks Courtney brings is represented as "x", she would have brought 8 snacks.

Hope this helped! :)

Answer:

4x + 3 = 11

4x = 11 - 3

4x = 8

x = 8 ÷ 4

x = 2

3x - 5 = 7

3x = 7 + 5

3x = 12

x = 12 ÷ 3

x = 4

8x - 5 = -37

8x = -37 + 5

8x = -32

x = -32 ÷ 8

x = -4

7(x - 3) = 21

7x - 21 = 21

7x = 21 + 21

7x = 42

x = 42 ÷ 7

x = 6

Answer:

Step-by-step explanation:

No real solutions exist. Subtract 8 on both sides to get:

[tex]x^2=-20[/tex]

You cannot take the square root of a negative number without involving imaginary numbers.

Answer and Explanation

__________________________________________________________

__________________________________________________________

The answer is -10 because...

You need to multiply 2 by "x," and to find out what "x" is, we need to add...

[tex]2+-12[/tex]

__________________________________________________________

And if we add  [tex]2[/tex] by [tex]-12[/tex], we get [tex]-10[/tex], which is our answer.

__________________________________________________________

and now, if we add [tex]-20[/tex] by  [tex]8[/tex], we get [tex]-12[/tex], which is what the equation equals, and this is how we know it is correct.

__________________________________________________________

Hope this helps! :)

Answer:

(4,0)

Step-by-step explanation:

Let's solve your system by elimination.

5x+2y=20;6x+5y=24

Multiply the first equation by 5,and multiply the second equation by -2.

5(5x+2y=20)

−2(6x+5y=24)

Becomes:

25x+10y=100

−12x − 10y = −48

Add these equations to eliminate y:

13x = 52

Then solve13x=52for x:

13x=52

(Divide both sides by 13)

x=4

Now that we've found x let's plug it back in to solve for y.

Write down an original equation:

5x+2y=20

Substitute 4 for x in 5x + 2y = 20:

(5)(4)+2y=20

2y+20=20 (Simplify both sides of the equation)

2y+20+ −20 = 20 + −20 (Add -20 to both sides)

2y = 0

(Divide both sides by 2)

y=0

Answer:

1) open dot on 1 and make a line going towards -10

2) closed dot on -6 doing towards 10

Step-by-step explanation:

When it has the line under it means that its included which is why u use a closed dot :)

hope this helps

question 3 = $150 because 50% is one half of 100% so 300/2 = 150

Answer:

3. 200

4. 9

Step-by-step explanation:

3. 300 divided by 1.5 is 200 which means 200 was the original price

4. 65 times .4 is 26 so 65 plus 26 is 91 and 100-91 is 9 so she had 9 left over

Multiply the cost of one pencil by the quantity of pencils (p) you buy:

Total = 0.19p

Answer:

Im trying to answer some myself

Step-by-step explanation:

Answer:

1:6

Step-by-step explanation:

Answer:

Write it on your own

Step-by-step explanation:

:-) :-)

I hope it helps you ❤️❤️❤️❤️

They subtracted 5 on both sides of the equation. They were suppose to add 5 on both sides of the equation for it to cancel out each other. If you need any further explanation, please ask me :)

Correct version:

5y + (-5) = 10

       +5     +5    add 5 to both sides, 5's will cancel out on left side.

___________

5y     15

__ = __        divide 5 on both sides, 5's will cancel out on left side.

5      5

y = 3, final answer

Answer:

its the first part the (-5) -5  is supposed to be (-5) +5

Step-by-step explanation:

so the equation is 5y=15

then you divide 5y/5 is y so then you 15/5 is 3

so the answer is y=3

Answer:

True

Step-by-step explanation:

Answer:

c) 126 inches of the answer

Answer:

C. 126 inches²

Step-by-step explanation:

To find the area of a trapezoid multiply the sum of the two bases (12 + 16) and the height divide by 2 (9 / 2) by each other

(12 + 16)9/2

Add 12 and 16 to get 28.

28(9/2)

Multiply 28 by 9 to get 252.

252/2

Divide 252 by 2 to get 126.

The area of the trapezoid is 126 inches².

Answer:

x = 5 (see below)

Step-by-step explanation:

Combine like terms by subtracting on both sides:

25 + 8x = 5 + 12x

20 = 4x

Then divide:

20 = 4x

5 = x

Move the variable to the left side of the equation:

x = 5

Answer:

The answer is 19672212.8cm

Answer:

2 cm^3

Step-by-step explanation:

You have the Volume- 125.6 cm^3

And the height- 10 cm

So you will just do the equation just a different way.

[tex]V= \pi rx^{2} h[/tex]

125.6 = 3.14·x²·10

Once you solve that you get the radius which is 2

So the answer shall be 2

Answer:

C

Step-by-step explanation:

This answer choice is not correct because u can't write a quote as an equation

Hope this helps u ;)

Pls mak brainlist

Answer:

2*1/2+2=3

-4x-2y=-6 is x=−1/2y+3/2

Step-by-step explanation:

Answer:

3 weeks 21 days, 5 weeks 35, 7 weeks 49, 9 weeks 63 days

Step-by-step explanation:

Each week is 7 days

Answer:

c

Step-by-step explanation:

5 times 4 plus n is greater than 55

Answer:

feet

Step-by-step explanation:

The others measure liquid or weight.

Answer:

feet

Step-by-step explanation:

Both inches and feet could be used, but inches are so small that it would take much longer to measure the wall than it should. Feet are the appropriate unit to measure a wall.

Answer:

e

Step-by-step explanation:

e

Answer:

A

Step-by-step explanation:

Answer:

Step-by-step explanation:

3x + 2·10 + 1·15 = (3x + 35) dollars

Answer:

Step-by-step explanation:

you only need the rate of change and the y intercept.

===================================================

Explanation:

Let's compute the slope of the line through the two original points

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

m = (4-10)/(7-(-2))

m = (4-10)/(7+2)

m = -6/9

m = (-2*3)/(3*3)

m = -2/3

The slope is -2/3

-------------

Now apply the scale factor.

We'll multiply each coordinate of each point by 2

(-2,10) becomes (-4,20) after multiplying each coordinate by 2

(7,4) becomes (14,8) after multiplying each coordinate by 2

Let's find the slope of the line through (-4,20) and (14,8)

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

m = (8-20)/(14-(-4))

m = (8-20)/(14+4)

m = -12/18

m = (-2*6)/(3*6)

m = -2/3

We get the same slope. This isn't a coincidence. Dilating a set of points will preserve the slope of the line through those points.

If A and B are the two original points, and A' and B' are the dilated counterparts, then the slope of line AB is the same as the slope of line A'B'.

The scale factor doesn't affect the answer.

Answer:

x = 4

y = 5

Step-by-step explanation:

4x = x + 12

^(subtract x from both sides)^

3x = 12

^(divide both sides by 3)^

x = 4

3y = 15

(divide both sides by 3)

y = 5

Answer:

the suare root of nine is rational (bc its 3) the other two are not

Step-by-step explanation:

can i get brainliest please???

it would be very much appreciated

have a nice day :)

Answer:

c = -4

Step-by-step explanation:

Let's solve your equation step-by-step.

13

4

+c=−

3

4

Step 1: Simplify both sides of the equation.

13

4

+c=−

3

4

13

4

+c=

−3

4

c+

13

4

=

−3

4

Step 2: Subtract 13/4 from both sides.

c+

13

4

−

13

4

=

−3

4

−

13

4

c=−4

Answer:

Move all terms not containing  c  to the right side of the equation.

c = - 4

Step-by-step explanation: