Could someone help with this math question

Answer:

14x - 12y

Step-by-step explanation:

Let's write the sum:

(10x - 4y) + (4x -8y)

Because we're only doing addition and subtractaction, we can drop the  parentheses that aren't preceded by a minus sign, they don't change the order.

10x - 4y + 4x - 8y

as long as we don't change the sign preceding each component, we can reorder as we wish

10x + 4x - 4y - 8y

(10x + 4x) - (4y + 8y)

note that because we added a parenthesis preceded by a - the sign inside changed.

We perform additions inside of the parentheses:

10x + 4x = 14x

4y + 8y = 12y

and we arrive at the final result:

14x - 12y

Answer:

well they're just copy pasting the questions from their essay response homework so...

Step-by-step explanation:

Answer: 0.67 unit

Step-by-step explanation:

Points are,

( 4 , 6 ) & ( 7 , 8 )

Distance= ( 8 - 6 )/( 7 - 4 )  = 0.67 unit

Answer:

-1

Step-by-step explanation:

Answer: 1

Step-by-step explanation:

400 is for 4( the hundredths place)

30 is for 3(the tens place)

1 is for 1( the ones place)

Answer:

You distribute the 2xy and get

2xy(3xy + 5y - xy^2) = 6(x^2)(y^2) + 10xy^2 - 2(x^2)(y^3)

Answer:

400 seconds

Step-by-step explanation: 150/20=7.5 meters per second

3000/7.5=400 seconds

Answer:

40 seconds

Step-By-Step Explanation:

150 x 20 = 3000

20 x 20 = 40

Answer = 40 seconds

Hope this helps :D

Answer:

7 remainder 42

Step-by-step explanation:

P.S Can I have brainliest?

Answer:

[tex]r=\sqrt{\dfrac{3V}{\pi h}}[/tex]

Step-by-step explanation:

The formula for the volume of a cone is given by :

[tex]V=\dfrac{1}{3}\pi r^2 h[/tex]

Where

r is radius of cone and h is its height

We need to solve the above formula for r.

Cross multiplying both sides of the given formula

[tex]3V=\pi r^ 2h[/tex]

Dividing both sides by πh.

[tex]\dfrac{3V}{\pi h}=\dfrac{\pi r^2 h}{\pi h}\\\\r^2=\dfrac{3V}{\pi h}\\\\r=\sqrt{\dfrac{3V}{\pi h}}[/tex]

So, the formula for r is [tex]\sqrt{\dfrac{3V}{\pi h}}[/tex]

Answer:

43046721/4096

m4n4

Step-by-step explanation:

Answer:

haha you are not going anywhere else to say it

The value of x after simplfication of equation -¼ ( x + 2) + 5 = - x is -6.

Consider the equation,

( - 1 / 4 ) × ( x + 2 ) + 5 = - x

Now,

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

( - x / 4 ) - ( 1 / 2 ) + 5 = - x

Now, LCM of 2 and 1 is 2.

Therefore,

( - x / 4 ) + [ ( 10 - 1 ) / 2 ] = - x

( - x / 4 ) + ( 9 / 2 ) = - x

Adding x on both sides of the equation.

( - x / 4 ) + x + ( 9 / 2 ) = - x + x

Subtracting ( 9 / 2 ) from each side of the equation,

( - x / 4 ) + x + ( 9 / 2 ) - ( 9 / 2 ) = ( - 9 / 2)

( - x / 4 ) + x = ( - 9 / 2 )

LCM of 4 and 1 is 4

[ ( - x + 4x ) / 4 ] = ( - 9 / 2 )

( 3x / 4 ) = ( - 9 / 2 )

By cross multiplying,

2 × 3x = - 9 × 4

6x = - 36

Dividing each side of the equation by 6.

( 6x / 6 ) = ( - 36 / 6 )

x = - 6

Learn more about equation here:

https://brainly.com/question/2972832

#SPJ9

Answer:

Q1. [tex](-\frac{3}{2},0)[/tex]

Q2. (-16, 0)

Step-by-step explanation:

The midpoint of a line segment is given by the formula:

[tex]\boxed{\text{Midpoint}=(\frac{x_1+x_2}{2} ,\frac{y_1+y_2}{2} )}[/tex]

In the formula, [tex](x_1,y_1)[/tex] is the first endpoint while [tex](x_2,y_2)[/tex] is the second endpoint of the line segment.

__________

Q1. Substitute the given endpoints into the formula:

Midpoint

[tex]=(\frac{-5+2}{2} ,\frac{5-5}{2} )[/tex]

[tex]=(\frac{-3}{2} ,\frac{0}{2} )[/tex]

[tex]= \bf{(-\frac{3}{2} ,0)}[/tex]

__________

Q2. Let the other endpoint be (x, y).

Substitute the given midpoint and one endpoint:

(-6, 4)=[tex](\frac{x+4}{2} ,\frac{y+8}{2} )[/tex]

Comparing the x-coordinate:

[tex]\frac{x+4}{2} =-6[/tex]

Multiply both sides by 2:

x +4= -12

Subtract 4 from both sides:
x= -12 -4

x= -16

Comparing the y-coordinate:

[tex]\frac{y+8}{2} =4[/tex]

Multiply both sides by 2:

y +8= 8

Subtract 8 on both sides:

y= 8 -8

y= 0

The coordinates of the other endpoint is thus (-16, 0).

__________

For more questions on midpoint, check out: https://brainly.com/question/17247547

Step-by-step explanation:

your own work, please ...

my own work is

1.

the midpoint between 2 points (x1, y1) and (x2, y2) is

((x1 + x2)/2, (y1 + y2)/2)

so, our midpoint is

((-5 + 2)/2, (5 + -5)/2) = (-3/2, 0/2) = (-3/2, 0)

2.

we have

((x1 + 4)/2, (y1 + 8)/2) = (-6, 4)

so,

(x1 + 4)/2 = -6

x1 + 4 = -12

x1 = -16

(y1 + 8)/2 = 4

y1 + 8 = 8

y1 = 0

so, the other endpoint is (-16, 0).

Answer:

7/25

Step-by-step explanation:

Answer is C

Answer:

Step-by-step explanation:

An absolute value is the distance a number is from 0 on the number line. So, regardless if it is a negative or a positive number, the distance from that number to 0 will always be positive. For example, -5 is 5 units away from 0, and 5 is also 5 units from zero. They have the same absolute value, even though one is negative and the other is positive.

Answer:

You can describe absolute value as a number's (Negative or positive) distance from zero.

Step-by-step explanation:

Say you have 4 and -4. 4's absolute value is four because it is four number units away from zero. -4 is a negative number but its absolute value would still be positive four because it is still four number units away from zero even though those number units are negative.

Answer:

c Sorry am not sure

Step-by-step explanation:

Answer:

[tex]\huge\boxed{\dfrac{x^2+9^2}{x-3y}+\dfrac{6xy}{3y-x}=x-3y}[/tex]

Step-by-step explanation:

Domain:

[tex]x-3y\neq0\Rightarrow x\neq3y[/tex]

[tex]\dfrac{x^2+9y^2}{x-3y}+\dfrac{6xy}{3y-x}=\dfrac{x^2+9y^2}{x-3y}+\dfrac{6xy}{-(x-3y)}\\\\=\dfrac{x^2+9y^2}{x-3y}-\dfrac{6xy}{x-3y}=\dfrac{x^2+9y^2-6xy}{x-3y}\\\\=\dfrac{x^2-2(x)(3y)+(3y)^2}{3y-x}=\dfrac{(x-3y)^2}{3y-x}\\\\=\dfrac{\bigg[-1(3y-x)\bigg]^2}{3y-x}=\dfrac{(-1)^2(3y-x)^2}{3y-x}\\\\=\dfrac{1(x-3y)(x-3y)}{x-3y}=x-3y[/tex]

Used:

The distributive property: a(b + c) = ab + ac

(a - b)² = a² - 2ab + b²

Answer:

option D.

Step-by-step explanation:

average rate of change in steel production over the eight days=-0.15 tons per day

Step-by-step explanation:

The production rate of a steel factory is declining due to old machinery. Over the last eight days production has dropped by 1.2 tons.

Production is dropped by 1.2 tons, so its negative

Average rate of change = Change in production / number of days

Average rate of change = -1.2/ 8= -0.15

so sorry -0.15

Answer:

The answer is 12.

Step-by-step explanation:

Answer:

12

Step-by-step explanation:

i took the test and got it right

For f(g(x)) it's f(5x+9)=2r-7

For g(f(x)) it's g(2r-7)=5x+9

Answer:

the answer is 99

Step-by-step explanation:

simply multiple 24 3/4 by 4

Answer:

99 miles per hour

Step-by-step explanation:

(24 3/4) / (1/4) =

99/4 x 4/1 =

396/4 = 99

Answer:

3x

Step-by-step explanation:

we don't know the value of x and we know we have 3 x's so we just add them together. But if we didn't know what ask for as we would just times that by 3

Answer:

Positive Integer

Step-by-step explanation:

An integer is a whole number.

462 is an integer and is positive.

Answer: positive integer

Step-by-step explanation:

Kinda obvious

Answer:

well, i think that it's l-2l + l9l

Step-by-step explanation:

hope its right:)

Answer:

8494.87 is the actual answer but the rounded version is 8494.9

Step-by-step explanation:

3.142×52^2=8494.866535

8494.9 nearest tenth