Please help meeeew il mark brainliest​

Answer:

Step-by-step explanation:

Given the expression 49m²-84mn+36n², this can also be written as;

49m²-84mn+36n²

= 7²m² - 84mn + 6²n²

= (7m)²-2*7m*6n+ (6n)²

= (7m-6n)²

= (7m-6n)(7m-6n)

Hence the expanded form is  (7m-6n)(7m-6n)

Answer:

5

Step-by-step explanation:

Simplifying

(8x + 9) + -1(6x + -1) = 0

Reorder the terms:

(9 + 8x) + -1(6x + -1) = 0

Remove parenthesis around (9 + 8x)

9 + 8x + -1(6x + -1) = 0

Reorder the terms:

9 + 8x + -1(-1 + 6x) = 0

9 + 8x + (-1 * -1 + 6x * -1) = 0

9 + 8x + (1 + -6x) = 0

Reorder the terms:

9 + 1 + 8x + -6x = 0

Combine like terms: 9 + 1 = 10

10 + 8x + -6x = 0

Combine like terms: 8x + -6x = 2x

10 + 2x = 0

Solving

10 + 2x = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-10' to each side of the equation.

10 + -10 + 2x = 0 + -10

Combine like terms: 10 + -10 = 0

0 + 2x = 0 + -10

2x = 0 + -10

Combine like terms: 0 + -10 = -10

2x = -10

Divide each side by '2'.

x = -5

Simplifying

x = -5

made by TheRealMarinette

Answer:

Step-by-step explanation:

Answer:

A)  x = 8[tex]\sqrt{2}[/tex]

Step-by-step explanation:

in a 45-45-90 triangle, the legs to hypotenuse ratio is 1 : [tex]\sqrt{2}[/tex]

so in this problem the leg is 8 and the hypotenuse is 8[tex]\sqrt{2}[/tex]

Answer:

dont forget the point of contact dedo I show you how w

Answer:

244.92 square inches

Step-by-step explanation:

You just have to fill in the formula with the information they gave you.

They gave you the diameter for base circle so you divide that number in half to get the radius which is what you need for the formula represent as "r".

r=3

h=10

and you know pi is 3.14

so just plug in the numbers.

SA=2x3.14x3^2+2x3.14x3x10

SA=6.28x9+6.28x30

SA=56.52+188.4

SA=244.92

Answer:

A rice cooker, also known as a rice steamer, is a popular small appliance that works like a slow cooker by using moist heat to cook food while trapping the flavors in the pot until it’s ready to enjoy. Modern rice pressure cookers significantly reduce rice-making time and often feature a warming setting so you can be flexible with meal times.

Step-by-step explanation:

This is a linear relationship.

Linear relationship is a statistical term used to describe a straight-line relationship between two variables. These two equations are written in the typical slope-intercept form of y = mx + c, this function creates a straight line when plotted.

Answer:

[tex]x[/tex]

Step-by-step explanation:

[tex]x + 5 - 5 = x[/tex]

Answer:

Oh this is actually pretty easy I think, I hope I get this right! So, Im pretty sure the first one goes to diagram C. The second one goes to diagram D. And I think the third one goes to diagram B. And the last one goes to diagram A. Please dont hate me if I am wrong! Sorry if I am though!

add up all the numbers, then divide by how many numbers there are.

Answer:

y = 6

Step-by-step explanation:

8y+1 + 6y+3 = 90

14y+6=90

14y=84

y = 6

Answer:

x > 4; r–1(x) = 4 + StartRoot StartFraction 11 Over x EndFraction EndRoot

Step-by-step explanation:

We are given that

[tex]r(x)=\frac{11}{(x-4)^2}[/tex]

We have to find the domain of restriction on r(x) and corresponding inverse function.

Let

[tex]y=r(x)=\frac{11}{(x-4)^2}[/tex]

[tex](x-4)^2=\frac{11}{y}[/tex]

[tex]x-4=\sqrt{\frac{11}{y}}[/tex]

[tex]x=\sqrt{\frac{11}{y}}+4[/tex]

[tex]r^{-1}(y)=\sqrt{\frac{11}{y}}+4[/tex]

Now, replace x by y and y by x then, we get

[tex]r^{-1}(x)=\sqrt{\frac{11}{x}}+4[/tex]

The function is not defined at x=4

But,

The inverse function defines for all positive real values.

Therefore, domain of r(x)=x>4 and inverse function

[tex]r^{-1}(x)=\sqrt{\frac{11}{x}}+4[/tex]

Option:

x > 4; r–1(x) = 4 + StartRoot StartFraction 11 Over x EndFraction EndRoot

Answer:

bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb

Step-by-step explanation:

b

Answer:

4

Step-by-step explanation:

4/6 x 6 can be thought of as 4/6 x 6/1.

When multiplying two fractions, multiply the numerator (top number) with the numerator and the denominator (bottom number) with the denominator.

So we have: (4x6) / (6x1)

Which can be simplified to: 24/6, or 4.

Let  me know if this helps!

Answer:

y=72

Step-by-step explanation:

the step by step is in the attachment above

Answer: Alana's training experience in (weeks, minutes per mile) is (1, 12) and (5, 6).

Kelsa's training experience is (1, 10), (11, 5).

Find:

A linear equation in standard form that describes Alana's experience

A linear equation in standard form that describes Kelsa's experience

A solution to the pair of linear equations

The week in which the number of minutes per mile is the same

Minutes per mile for Alana and Kelsa at week 25

Comment on the use of a linear model in this context

Solution:

Please note that in parts 1 and 2 a "standard form" linear equation has a positive leading coefficient and the numbers have no common factor.

1. A linear equation can be written from two points (x1, y1) and (x2, y2) as ...

... (y2 -y1)(x -x1) -(x2 -x1)(y -y1) = 0

Using the given points in order, this becomes

... (6-12)(x -1) -(5 -1)(y -12) = 0 . . . . above equation with values filled in

... -6x +6 -4y +48 = 0 . . . . . . . . . . eliminate parentheses

... 3x +2y -27 = 0 . . . . . . . . . . . . . divide by -2 to make x-coefficient positive

... 3x +2y = 27 . . . . . . . . . . . . . . . . Alana's training experience

2. In similar fashion, we can write the equation for Kelsa's experience.

... (5 -10)(x -1) -(11 -1)(y -10) = 0

... -5x +5 -10y +100 = 0 . . . . . . eliminate parentheses

... x +2y -21 = 0 . . . . . . . . . . . . . divide by -5

... x +2y = 21 . . . . . . . . . . . . . . . . Kelsa's training experience

3. We note that both equations have the term 2y, so we can subtract the second equation from the first to eliminate that term:

... (3x +2y) -(x +2y) = (27) -(21)

... 2x = 6 . . . . . . . simplify

... x = 3 . . . . . . . . divide by 2

... 3·3 +2y = 27 . . . substitute x=3 into Alana's equation

... 2y = 18 . . . . . . . . subtract 9

... y = 9 . . . . . . . . . . divide by 2

The solution is (weeks, minutes) = (x, y) = (3, 9).

4. The solution of part 3 tells us both have an average time of 9 minutes per mile in week 3 of training.

5. Substituting x=25 into the equations of parts 1 and 2, we get ...

... 3·25 +2y = 27

... y = (27 -75)/2 = -24 . . . . Alana's time per mile at week 25

... 25 + 2y = 21

... y = (21 -25)/2 = -2 . . . . . Kelsa's time per mile at week 25

6. A linear model makes no sense in this context. At some point a linear equation for minutes per mile will always have a value of 0. We know that marathon runners will never have a time of zero minutes per mile. Under the best of conditions, we expect training to improve time toward some asymptotic limit determined by body mechanics. A linear model is completely inappropriate for describing such training effects. Not every real-world problem is appropriately represented by a linear equation.

Step-by-step explanation:

The answer is 20

Work:

w=4

2w (2 X 4) + 12

8 + 12= 20

Hope this helps.

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Answer:

its the first one i believe

Answer:

I believe it's, The difference between a number and five is negative two.

Step-by-step explanation:

Answer:The number of text messages sent by his sister=162

Step-by-step explanation:

Step 1

The ratio of number of text messages sent by Lucas to the number of text messages sent by his sister =4 to 9= 4:9

Number of text messages sent by Lucas =72

Total ratio is given as 4+ 9= 13

Step 2

such that the total number of messages sent by Lucas and by his sister will be calculated as

Ratio of text messages sent by Lucas/  total ratio x Total messages  = Number of text messages sent by Lucas . Let X = Total number of messages  

4/13 x X = 72

X=72  x 13 / 4 =234

Therefore, The number of text messages sent by his sister= ratio of  text messages sent by his sister/ Total ratio x Total number of messages  =

9/13  X 234= 162 messages

Answer:

Just use desmos graphing

Edit: I did it on desmos, here's a screenshot

Answer:

It might be the the 1st or the 4th :)

Step-by-step explanation:

I HOPE IT HELPED!!!!

Answer:

62.8

Step-by-step explanation:

the circumference is equal to the radiusx2xpi

it gives us the diameter but not the radius

to find the radius from the diameter we just divide it by 2 so the radius is 10

then we just do 10x2x3.14 which is 62.8

Answer:

2x - 12

Step-by-step explanation:

Hello!

So, let's simplify using the distributive property.

Let's look at 3(2x - 4). You want to multiply 3 by every term inside the parentheses.

3*2x = 6x

3*-4= - 12

So now our expression looks like this:

(6x - 12) - 4x

Now we combine like terms. Our only like terms are 6x and -4x.

6x - 4x = 2x. So, our simplified expression is:

2x - 12.

Answer:

option 2

Step-by-step explanation:

:-)

Answer:

6x=24

Step-by-step explanation:

Because if Cindy has 6 friends and they all ride 4 miles it should equal 24.

Answer:

SSS

Step-by-step explanation:

Since all three sides of the triangle are congruent, we don't need to prove anything else, so we would use SSS (Side-Side-Side)