look at this triangle, work out length of BC

Answer:

B

Step-by-step explanation:

Use FOIL method

3x(5x) + 3x(- 2) + 3(5x) + 3(- 2)

Simplify to get 15 x^{2} -6x+15x-6  

Combine like terms to get 15x^2+9x-6

quadratic funcntion

quadratic term: 15x^2  

linear term: 9x

constant: -6

(sorry this was late I had other work and I didn't see this until now)

please mark me brainliest!

Answer:

x = 0, -3, 2

Step-by-step explanation:

Step 1: Set equal to 0

x³ + x² - 6x = 0

Step 2: Factor GCF

x(x² + x - 6) = 0

Step 3: Factor quadratic

x(x + 3)(x - 2) = 0

Step 4: Solve for x roots

x = 0, -3, 2

Answer:

The ratio of the number of gigabytes to the price in dollars for Dial It Up is 1:8

The ratio of the number of gigabytes to the price in dollars for Ring Ring is 1:9

Step-by-step explanation:

The word problem relates to the comparison between the cost of a gigabyte on Dial It Up network and the cost per gigabyte on Ring Ring network

On Dial It Up, 2 gigabytes costs $16

Therefore, 1 gigabytes costs $16/2 = $8

Which gives Dial It Up cost per gigabyte as $8 per gigabyte

On Ring Ring, 1 gigabytes costs $9

Which gives Ring Ring cost per gigabyte as $9 per gigabyte

The ratio of the number of gigabytes to the price in dollars for Dial It Up is 1:8

The ratio of the number of gigabytes to the price in dollars for Ring Ring is 1:9.

Answer:

x + y + z = 40

2x + 3y + 3z = 110

x + y + 2z = 50

Step-by-step explanation:

let

x = photograph

y = painting

z = neckless

the first part reads that jada sells 1 photograph, 1 painting, and 1 neckless. this written in a mathematical formula will be x + y + z = 40

the second part reads that jada sold 2 photographs, 3 paintings, 3 necklaces. This written as a mathematical formula will be 2x + 3y + 3z = 110

the third part reads that jada sold 1 photograph, 1 painting, and 2 necklaces. this written in a mathematical formulawill be x + y + 2z = 50

Answer:

The population in 2008 is 171 million

Step-by-step explanation:

In order to calculate the population in 2008 using the exponential growth formula we would have to make the following calculation:

population in 2008= population in 1996 + population increased between 1996 and 2008

According to the given data:

population in 1996=153 million

population in 1992=147 million

Therefore, the increase of population from 1992 to 1996=153 million-147 million= 6 million

Therefore, the increase of popoulation is 1 1/2 million each year.

Therefore, if from 1996 and 2008 are 12 years, the population increased between 1996 and 2008= 12 x 1 /1/2 = 18 million.

Therefore, population in 2008=153 million + 18 milliion

population in 2008=171 million

The population in 2008 is 171 million

Answer:

C

Step-by-step explanation:

y=3(x-2)² is the equation of the parabola that has a vertex at (2,0) and a y-intercept of (0,12).

A parabola is a plane curve which is mirror-symmetrical and is approximately U-shaped.

We have to find  equation of the parabola that has a vertex at (2,0) and a y-intercept of (0,12).

Vertex=(2, 0)

y=a(x-2)²

12=a(0-2)²

12=4a

Divide both sides by 4

a=3

Now put a value in above equation

y=3(x-2)²

Hence, y=3(x-2)² is the equation of the parabola that has a vertex at (2,0) and a y-intercept of (0,12).

To learn more on Parabola click:

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Answer:

The standard form of this slope-intercept form is x + 4y = 16.

Answer:

x + 4y =16

Step-by-step explanation:

[tex]y= \frac{-1}{4}x+4[/tex]

Multiply by 4

[tex]4y=4*\frac{-1}{4}x+4*4\\\\[/tex]

4y = -x + 16

x + 4y =16

Answer: 3rd graph

Explanation: In order to determine which graph shows a downward or negative slope, we need to be able to look at each of the graphs and determine which line is decreasing when going from left to right.

Notice that the 3rd graph is the only graph with a downward

or negative slope which means that this is our answer.

Answer: mark the guy above as brainiest he deserves it.

Step-by-step explanation:

Answer:

[tex]y=-6[/tex].

Step-by-step explanation:

If a horizontal line passing through a point (a,b), then the equation of horizontal line is [tex]y=b[/tex] .

In the given question, it is clear that the horizontal line passing through the point (4,-6).

Here, [tex]a = 4[/tex] and [tex]b = -6[/tex].

Since, the equation of horizontal line is [tex]y=b[/tex] , therefore the required equation is

[tex]y=-6[/tex]

Hence, the equation of horizontal line is [tex]y=-6[/tex].

Answer:

The answer is c

Answer:

the second one, [144,174]

Step-by-step explanation:

since the suits weigh 1 pound, it means the body builders have to weigh one pound less than they normally would to make up for that one pound. therefore, the range is 144 (one less than 145) to 174 (one less than 175)

hope this helps! comment if any part doesn't make sense so I can clarify ;-3

Answer:

Hai.

If adam runs 30 Miles per hour, then we can set an equatio.

30miles for 1 hour

x for 10 minutes.

we should do this equity. 10minutes×30miles÷60minutes.

10×30 = 300÷60 = 5miles.

good luck. if you have question, u can ask

Answer:

40cm^2

Step-by-step explanation:

becuase since all the sides of the square is equal, when you add it up, you will get 40 as your answer

Answer: A

Step-by-step explanation:

[tex]a^{2} + b^{2} = c^{2}[/tex]

A and B are the legs of the triangle, and c is the hypotenuse. A would make the most sense.

The sum of the squares of the lengths of the legs of a right triangle equals the square of the length of the hypotenuse.

" In a right angled triangle the square of the hypotenuse is equals to the sum of the square of the other two sides of the right angled triangle."

According to the question,

As per the Pythagoras theorem ,

(Hypotenuse)² = (Adjacent side)² + ( opposite side)²

Hence, we conclude that Option A is correct.

Learn more about Pythagoras theorem here

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Answer: The second option is correct, 6 is in the domain of f composition g.

Answer:

C

Step-by-step explanation:

The dependent variable is the one on the y-axis which would be distance. This makes sense because the amount of time the dragonfly flies determines the distance it flies. The equation is y = 22x. When x = 24, y = 22 * 24 = 528.

Answer:

D

Step-by-step explanation:

7.6/3.8 = 2

The dilation is by scale factor 2.

8/2 = 4

11/2=5.5

Calculate the volume.

Cross section × height

4 × 3.8 × 1/2 × 5.5 = 41.8

The volume of the smaller prism is 41.8 ft³.

Answer:

x ≥ $17, 500

Step-by-step explanation:

To find the cost of the next year model, we will follow the steps below;

Let x be the value of next year's model

$14000 ≤ 80% of  x

80% of  x ≥  $14000

80% × x ≥$14000

80x/100    ≥  $14000

multiply both-side of the equation by 100

80x ≥  $1400000

Divide both-side of the inequality by 80

80x /80 ≥ $1400000 / 80

x ≥ $17, 500

Therefore the cost of next year's model is

x≥$17, 500

Answer:

Step-by-step explanation:

download math photo it will give you free answers

Answer:

18 : 3

Step-by-step explanation:

Basic proportionality question. All we need to here is to expression the given fractions ( [tex]11 \frac{2}{3}[/tex], and [tex]1 \frac{17}{18}[/tex] ) as a fraction itself, and hence expressing the ratio we need to get, in fraction form.

[tex]11 \frac{2}{3} / 1 \frac{17}{18}\\\\[/tex] - So, we have expressed this in a fraction, which we want to reduce

[tex]= \frac{35}{3} / \frac{35}{18}[/tex] - The fractions have been taken as improper fractions

[tex]\\\\= \frac{35}{3}( \frac{18}{35} )\\ \\[/tex] - Now we took the inverse fraction, through multiplication

[tex]= 18 / 3[/tex] - 35 and 35 cancel out, leaving us with the simplified fraction 18 / 3

_____

So now we have 18 / 3, the ratio in fraction form. The scale is thus 18 to 3, or in other words 18 : 3.

Hope that helps!

The answer to this question would be A or Y = 3x.

Hope you do great!

Answer

-4

Step-by-step explanation:

you make them equal to each other and find x and then dounble it which is -4.

Answer: Y = 3 × 2^x

Step-by-step explanation:

Let assume that the equation of the exponential function represented by the table is

Y = 3(2)^x

When x = 0

Substitute x for 0. Then,

Y = 3 × 2^0

Anything raised to power of zero is equal to one.

Y = 3 × 1 = 3

When x = 1

Repeat the process

Y = 3(2)^1

Y = 3 × 2 = 6

When x = 2

Y = 3(2)^2

Y = 3 × 4 = 12

And finally, when x = 3

Y = 3(2)^x

Substitute x for 3

Y = 3 × 2^3

Y = 3 × 8

Y = 24.

We can therefore conclude that the equation of the exponential function represented by the table above is

Y = 3 × 2^x

Answer:

35 (b)

Step-by-step explanation:

Area of a triangle = (height times base)/2

Height = 5

Base = 14

14 times 5 = 70

70/2 = 35

Answer:

it was b ) 35 units

Step-by-step explanation:

cuz 5*14 you got 70

then when is a triangle you have to do 70 divide by half

so you will got you answer which is b)35 units

hope it helps

Answer:

D. Negative exponential growth

Answer:

D

Step-by-step explanation:

BIG BRAIN

Answer:

(z - 5)3

Step-by-step explanation:

Since we are following the directions strictly, we must subtract 5 from z first.

z - 5

Then we multiply the ENTIRE thing by 3

3(z - 5)

Answer:

(z-5)3 or (z-5)*3

Step-by-step explanation:

Use Pedmas. I am sorry I am not good a explaining but that is the answer.

Answer: 1 1/2

Step-by-step explanation:

6 1/2 - 5 = 1 1/2

Since [tex] \frac{dy}{dx}=-3-4x[/tex], putting $x=0$ gives us the gradient of the tangent at the point where the curve cuts the Y axis.

Thus $\frac{dy}{dx}=-3$

Answer:

Since , putting $x=0$ gives us the gradient of the tangent at the point where the curve cuts the Y axis.

Thus $\frac{dy}{dx}=-3$

Step-by-step explanation:

I think that It’s 25%

Answer:

3/12=1/4

Step-by-step explanation:

elliot,nevaeh and taylor are 3 boys from the 12 boys

so the probability is 3/12

we should always write in simple form so 1/4

that's  25%

hope it helps<3<3

plz rate

Answer: x = 47

Step-by-step explanation: When you're asked to solve for x in an equation, what you're really being asked to do is get x by itself on one side of the equation.

In this problem since 15 is being added to x, in order to get x by itself,

we must subtract 15 from the left side of the equation.

If we subtract 15 from the left side, we must also subtract 15 from

the right side of the equation to keep the equation balanced.

So we have x = 47.