please help me it's really urgent ​

Answer:

The value of x is 4.8. The length of BC is 14.6.

Step-by-step explanation:

I combined the two expressions 3x+1 and 2x+5 to 5x+6=30

1. I subtracted 6 from 6 and 30 in the equations.

2. I was left with 5x=24

3. I then divide 5 from 5x and 24

4. I got x=4.8

To get the length of BC

2x+5

1. I multiplied 2×4.8

2. I got 9.6

3. I then add 5 to 9.6

4. I finally get the answer 14.6 which is the length of BC

Answer:

[tex]\overline{BC}=14.6[/tex]

Step-by-step explanation:

we know that

[tex]\overline{AC}=\overline{AB}+\overline{BC}[/tex]

so

[tex]30=3x+1+2x+5\\\\30=(3x+2x)+(1+5)\\\\30=(3+2)x+(1+5)\\\\30=5x+(1+5)\\\\30=5x+6\\\\5x+6=30\\\\5x+6-6=30-6\\\\5x+0=30-6\\\\5x=30-6\\\\5x=24\\\\\frac{1}{5}(5x)=\frac{1}{5}(24)\\\\\frac{5}{5}x=\frac{1}{5}(24)\\\\\frac{1}{1}x=\frac{1}{5}(24)\\\\x=\frac{1}{5}(24)\\\\x=\frac{24}{5}\\\\x=4.8[/tex]

and now we solve for BC

[tex]\overline{BC}=2x+5\\\\\longrightarrow x=4.8\longleftarrow \\\\\overline{BC}=2(4.8)+5\\\\\overline{BC}=9.6+5\\\\\overline{BC}=14.6[/tex]

so that's our answer

9514 1404 393

Answer:

  x^3 -4x^2 +12x -27

Step-by-step explanation:

Use the distributive property.

  = (x^2 -x +9)(x) +(x^2 -x +9)(-3)

  = x^3 -x^2 +9x -3x^2 +3x -27

  = x^3 -4x^2 +12x -27 . . . . . collect terms

Therefore the reflection of the point (m,0)and m≠0 will produce an image located at (0,-m) when reflection occurs across the line y=(-x).

Answer:

a reflection of the point across the line y = –x

Step-by-step explanation:

Let m = 5.

Graph (5, 0).

Then graph (0, -5).

Then draw the line y = -x.

You will see that the line y = -x is the axis of symmetry for the two points.

Answer:

a reflection of the point across the line y = –x

Answer:

the answer to thus question is 9

Answer:

9

Step-by-step explanation:

1,000

fourth digit every time, unless a number is a decimal,

Answer: the answer would be 9!

Step-by-step explanation:

if the number started with 9, it would be 9,234, which reads nine thousand two hundred thirty-four.

hope this helps :)

Answer:

The remaining number in thousands units is 9

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Thank you so much for participate in the community of Brainly.com

I hope help you :)

Kind regards, Antonio.

Answer:

About 100 centimeters.

Step-by-step explanation:

1,400 - (13 * 100) = 100

Answer:

b. False

Step-by-step explanation:

The answer is false because the standard deviation was miscalculated.

We can compute the formula for calculating the standard deviation as:

[tex]\sigma = \sqrt{\dfrac{\sum (x_i-\overline x)^2}{n}}[/tex]

As a result of the  square in the numerator of the summation, the square [tex]\sum (x_i-\overline x)^2[/tex]   is usually non-negative.

Even if the data is positive, negative or zero, as a result of the above claim, the standard deviation is always non-negative.

Thus, the fact that the first student who finishes the calculation first and claim that the standard deviation is -1.8 is false.

Answer:

2 portraits

Step-by-step explanation:

since she painted 3 in 15 minutes, it means that she took 5 minutes on each portrait. If Natalie were to paint portraits for 10 minutes she would paint 2 portraits

3p in 15min = 1p in 5min = 2p in 10min

Answer:

Step-by-step explanation:

Step-by-step explanation:

use the above picture as a reference and solve

Answer:

36°

Step-by-step explanation:

So, the angle measure of x+15 is 36 because x = 21

The angle measure of 3x-9 is 54, but this is bigger than the one before.

So, the smallest angle is 36

Please give the other person brainliest cause they deserve it more than me.

Given a complex number z = a + b i, the real part is Re(z) = a and the imaginary part is Im(z) = b.

So given that z = 6 - 3 i, we have Re(z) = 6 and Im(z) = -3.

Answer:

1 3 5

Step-by-step explanation:

what is your question ?

i don't understand

Answer:

1  7/20

Step-by-step explanation:

So, you added the 15/20 and 12/20 to get 27/20

Then to simplify 27/20 you have to see how many times 27 can go into 20

27 can go into 20 with a remainder of 7 which then will lead you to the answer of 1 7/20 and you can't simplify it anymore.

Hopefully, that helps.

Answer:

The speed would be 60kph

60/60=1

Step-by-step explanation:

60x24=1,440

It would at a speed of 1,440km per day.

In a year it would go 525,600 km.

Every nanosecond it would go 0.0001 cm.

Answer:

○ B. [tex]\displaystyle 69\:inches\:to\:75\:inches[/tex]

Explanation:

The Empirical Rule states that sixty-eight percent of the population will be within one standard deviation of the mean in height. Therefore, you perfourm the operations below:

[tex]\displaystyle \boxed{75} = 3[1] + 72 \\ \boxed{69} = -3[1] + 72[/tex]

I am joyous to assist you at any time.

Find upper range and lower range by adding and subtracting standard deviation respectively.

Lower range

Upper range:-

Option B is correct

The circumference is πd, and the diameter is 10, so the circumference is 10π. All sides of a square are equal, so the length of each side is 10π/4, which is 2.5π.

The length of each side of the square is 2.5π  

Answer:

182.08

Step-by-step explanation:

Answer:

19,2000

Step-by-step explanation:

Answer:

78

Step-by-step explanation:

Answer:

(-2, 4.5)

Step-by-step explanation:

The midpoint formula is [tex](\frac{x_{1} +x_{2}}{2} ,\frac{y_{1} +y_{2}}{2})[/tex]

(-5+1/2, 3+6/2)

(-4/2, 9/2)

Your answer will be (-2, 4.5)

Answer:

y=-1x-8

Step-by-step explanation:

Answer:

Step-by-step explanation:

x₁ = 0   ; y₁=0  &

x₂ = 1    ; y₂=2

Slope =[tex]\dfrac{y_{2}-y_{1}}{x_{2}-x_{1}}[/tex]

         [tex]=\dfrac{2-0}{1-0}\\\\\\=\dfrac{2}{1}\\\\\\= 2[/tex]

Slope = 2

Answer:

22 in

Step-by-step explanation:

volume of a right prism = area of base x height

Given:

⇒ 352 = 16 × height

⇒ height = 352 ÷ 16

⇒ height = 22 in

Height be x

[tex]\\ \rm\rightarrowtail 16x=352[/tex]

[tex]\\ \rm\rightarrowtail x=352/16[/tex]

[tex]\\ \rm\rightarrowtail x=22[/tex]

Answer:

3315.84mm^2.

Step-by-step explanation:

We calculate the diameter of the base of the cylinder using Pythagoras:

40^2 = d^2 + 32^2

d^2 = 40^2 - 32^2 = 576

d = sqrt 576 = 24 mm.

So the radius = 1/2 diameter = 12 mm.

The surface area

= 2(3.14)(12)^2 + 2(3.14)(12)(32)

= 904.32 + 2411.52

= 3315.84.

Answer:

C. X8

Step-by-step explanation:

correct me if im wrong

Answer:

See below.

Step-by-step explanation:

The answer would be x^8.

When multiplying exponents, you add them, rather than actually multiplying.

-hope it helps

Answer:

The population in 2012 is estimated in approximately 223 million people

Step-by-step explanation:

Exponential Growth

The formula for exponential growth of a variable P at the growth rate r, as time t goes on in discrete intervals, or at integer times 0, 1, 2, 3, ..., is :

[tex]\displaystyle P(t)=P_0(1+r)^{t}[/tex]

Where Po is the value of P at time 0.

The country’s population in 1991 was 211 million, and in 1998 it was 215 million. We have two discrete times to define the equation and set the year 1991 as t=0. Thus, the year 1998 is t=7.

The preliminary equation is:

[tex]\displaystyle P(t)=211(1+r)^{t}[/tex]

To find the value of 1+r, we use the second point (7,215):

[tex]\displaystyle 215=211(1+r)^{7}[/tex]

Dividing by 211:

[tex]\displaystyle \frac{215}{211}=(1+r)^{7}[/tex]

Solving:

[tex]\displaystyle (1+r)=\sqrt[7]{\frac{215}{211}}[/tex]

Calculating:

[tex](1+r)=1.002686[/tex]

The complete equation is:

[tex]\displaystyle P(t)=211(1.002686)^{t}[/tex]

Estimate the population in 2012 (t=21):

[tex]\displaystyle P(21)=211(1.002686)^{21}[/tex]

[tex]P(21)\approx 223[/tex]

The population in 2012 is estimated in approximately 223 million people