If a= 11, solve for b and c (will give Brainliest ❤️)

Answer:

The mean of T is 10 seconds

Step-by-step explanation:

The given parameters are;

The mean completion time of each step, μ = 10 seconds

The standard deviation, σ = 5 seconds

Each step is independent from the other steps

The variable that represents the total completion time for the three steps = T

We have the mean of T, [tex]\overline T[/tex], given by the combined mean as follows;

[tex]\overline T = \dfrac{n_1 \cdot \overline x_1 + n_2 \cdot \overline x_2 + n_3 \cdot \overline x_3 }{n_1 + n_2 + n_3 }[/tex]

Where;

[tex]The \ mean \ completion \ time \ for \ each \ step \ is \ \overline x_1 = \overline x_2 = \overline x_3 = 10 \ seconds[/tex]

n₁ = n₂ = n₃ = 1, each step is taken only once, we have;

[tex]\overline T = \dfrac{1 \times 10 + 1 \times 10 + 1 \times 10 }{1 + 1 + 1 } = \dfrac{30}{3} = 10 \ seconds[/tex]

Therefore, the mean of T = 10 seconds

Using the normal distribution, it is found that the mean of T is of 30 seconds.

A normal distribution has two parameters: Mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex].

In this problem, the mean is [tex]\mu = 10[/tex] and the standard deviation is [tex]\sigma = 5[/tex].

For the total completion, there are 3 instances, hence [tex]n = 3, n\mu = 3(10) = 30[/tex], hence, the mean of T is of 30 seconds.

A similar problem is given at https://brainly.com/question/24085252

Answer:

For the first one its 600 yards...and for number 6 its 351.86

Answer:

he took $55.8for 1hr

Step-by-step explanation:

it's because we should devid eit for calculation for minute

Answer:

Step-by-step explanation:

a). Let the number of spoons = x

And number of forks = y

Total number of spoons and forks bought by Perry = 10

x + y = 10 --------(1)

Cost of one spoon = $5

Cost of one fork = $3

Therefore, total cost of x spoons and y forks = $(5x + 3y)

5x + 3y = 42 -------(2)

b). Now we can convert these equations into the slope-intercept form.

x + y = 10 ⇒ y = -x + 10

Table for input output values,

x        2         4          6          

y        8         6          4                

5x + 3y = 42

3y = -5x + 42

y = [tex]-\frac{5}{3}x+14[/tex]

x        0           3          6        

y       14           9          4                  

Point of intersection of these lines will be (6, 4).

Step-by-step explanation:

bicycle cost= 310

initial money in savings account= 50

additional money saved per week = 20

number of weeks = w

you have to set up an equation

The equation is...

bicycle cost = additional money saved × w + initial money

Substitute the values

310 = 20w + 50

Solve for w

310 - 50 = 20w +50 - 50

260 = 20w

260÷ 20 = 20w÷ 20

13 = w

It will take 13 weeks for her to have enough money for her bicycle

I hope this helps!!!

Answer: Yes the mixed 3 1/4 is a rational number.

Step-by-step explanation:  

Answer: C- He made a computation error when he added 10.35+7.6.

Step-by-step explanation:

Noam did not line up the decimals when he was adding 10.35 and 7.6. So if you line up the decimals, you would get 17.95 instead of 17.41.

Answer

C.

Step-by-step explanation:

He made a computation error when he added 10.35+746.

*Cough* E d g e n u i t y *Cough*

Sorry I think I am coming down with something...

*Cough* It's right *Cough*

Please give me brainliest!!

There will be 130 nickels and 90 dimes. 100 nickels is 5 dollars. 90 dimes are 9 dollars. And then there will be 30 left. 30 dimes isn’t 1.50$ bur 30 nickels is 1.50$ so you add the 30 to the nickels and it’ll be exactly 15.50$.

Answer:

15 50..…......................

Answer:

30

Step-by-step explanation:

15:50*100 = ( 15*100):50 = 1500:50 = 30

Answer:

thirty

Step-by-step explanation:

cuz dis bussin. duh.

Answer:

16.85 cm²

Step-by-step explanation:

Find the area of the small circle then subtract the area of the large circle by the small circle

Area of small circle :

πr², where  r = 4cm

π(4²) = 50.27 cm²

67.12 - 50.27 = 16.85 cm²

Answer:

Step-by-step explanation:

Area of a circle = π r²

where r = 80/2 = 40 in

plugin value of r=40in into the formula:

Area of a circle = π r²

                         = π (40)²

                         = 5027 in²

Given that,

Michael is leaving a 15% tip for his waitress.

To find,

What percent of the  original price will he pay.

Solution,

Let the original price was 100%.

When he leaves a 15% tip for the waitress, he is really paying 100%+15%=115% of the original price.

[tex]115\%=\dfrac{115}{100}\\\\=1.15[/tex]

or

[tex]\dfrac{115}{100}=\dfrac{23}{20}[/tex]

So, this is the required solution.

Answer:

c

Step-by-step explanation:

This is c because the numbers in c are moving down by -5.

Answer:

I would say b

Step-by-step explanation:

-5 times 5 is -25

-5 times -25 is 125 ect

Answer:

Y-intercept: (0, 0.4)

X-intercepts: (0.3, 0)

Answer:

The y-intercept is (0, 0.4), and the x-intercept is (0.3, 0)

Step-by-step explanation:

To find the intercepts of the line, you need to see what points lie on the x and y-axis.

When i text i mostly misspell, carrot as caroot

When i text, my autocorrect changes rat to fat.

False

True B)

Answer:

5 : x=3

Step-by-step explanation:

Answer:

Step-by-step explanation:

Step 1: Find AB Use Pythagoras Theorem

AB = [tex]\sqrt{AC^{2} -BC^{2} } = \sqrt{12^{2} -8^{2} } = \sqrt{80}[/tex]

Step 2: Find the Area of the triangle ABC

Area = [tex]\frac{1}{2}AB.BC = \frac{1}{2}\sqrt{80}.8 = 4\sqrt{80}[/tex] = [tex]16\sqrt{5}[/tex]

Step 3: Find BD. Use the area of the triangle above

Area = [tex]\frac{1}{2}BD.AC[/tex]

We already known the Area and AC so, we just plug all the number in

BD = [tex]\frac{2. Area}{AC}[/tex] =  [tex]\frac{2.16\sqrt{5}}{12}[/tex] = [tex]\frac{8\sqrt{5}}{3}[/tex]

Step 4: Find DC. Use Pythagoras Theorem of the triangle BDC

DC = [tex]\sqrt{BC^{2}-BD^{2} }[/tex] = [tex]\sqrt{8^{2}-(\frac{8\sqrt{5}}{3})^{2}}[/tex] =  [tex]\frac{16}{3}[/tex]

Answer:

d.   [tex]y+4=\frac{1}{2}(x-7)[/tex]

Step-by-step explanation:

Here m=1/2 and (x1, y1)=(7, -4)

Equation of line in point slope form is given as

[tex]y-y_1=m(x-x_1)[/tex]

Therefore

[tex]y+4=\frac{1}{2}(x-7)[/tex]

Answer:

The rate of change of the radius of the cone when the radius is 3 inches is 0.[tex]\overline 3[/tex] inch/minute

Step-by-step explanation:

The given parameters are;

The radius of the cone = 3 inches

dV/dt = 9·π in.³/min

The height, h = 3 × Radius, r

The formula for the volume of a cone, V is V = 1/3×π×r²×h = 1/3×π×r²×3×r = π·r³

Therefore, we have;

dV/dt = dV/dr × dr/dt

dV/dr =3·π·r²

∴ dr/dt = dV/dt/(dV/dr) = 9·π/(3·π·r²) = 3/r²

When r = 3 inches, we have;

dr/dt = 3/r² = 3/(3²) = 1/3 inch/minute

The rate of change of the radius of the cone when the radius is 3 inches = 0.[tex]\overline 3[/tex] inch/minute

Answer:

B,D,E

Step-by-step explanation:

b-multiply by 2 for both

d- multiply by 7 for both

e-multiply by 11 for both

Answer:

30%

Step-by-step explanation:

The price for each shirt to buy is: $ 700/100 = $ 7 / each

Selling price is: $ 10 / each

So the difference between the selling and buying prices is: $ 10 - $ 7 = $ 3

So 100 each, the interest is: $ 3 X100 = $ 300 => 30%

Answer: x^7

Step-by-step explanation: x5*x2

=(x*x*x*x*x)*(x*x)

=x*x*x*x*x*x*x

=x7

Answer:

5 feet

Step-by-step explanation:

5(2) + 2 = 12

12 x 2 = 24

5 x 2 = 10

10 + 24 = 34.

Hope It Helps!

The dimensions of a rectangle are;

Length = 32 feet

Width = 15 feet

Here,

The length of a rectangle is 2 feet more than twice the width.

The perimeter of a rectangle is 34 feet.

What are the dimensions of the rectangle?

The two main dimensions of a rectangle are length (L) and width (W).

Now,

Let width of the rectangle is x

Then, length of rectangle is 2x + 2

The perimeter of a rectangle is 34 feet.

⇒ x + x + (2x + 2) +( 2x + 2) = 34

⇒ 6x + 4 = 34

⇒ 6x = 30

⇒x = 5

Hence, The dimensions of a rectangle are;

Length = 2x + 2 = 32 feet

Width = x = 15 feet

Learn more about The dimensions of a rectangle visit:

https://brainly.in/question/587424

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Answer:

Step-by-step explanation:

let original price be x

x=45/(1-25/100)= 45/(1-0.25)=45/.75=60

x=60

Answer:

25 percent off 45.00 is 33.75. The difference is 11.25. Hope that helps :)

Step-by-step explanation:

Answer:

B. 15 gallons

Step-by-step explanation:

We don't need an exact answer, so we estimate

To do this, we round

41 is a tens number, so I'm going to round to the nearest 10

40

612.9 is a hundreds number, so I'm rounding to the nearest hundred

600

for EACH gallon, the car drives(roughly) 40 miles. If I have driven(roughly) 600 miles, that means I have used 600/40=15 gallons

Answer:

Step-by-step explanation:

Given points:

Slope is:

Use formula y = mx + b, substitute x = -2, y = 1, m = -3/5, find y-intercept b:

Correct option is B.

Step-by-step explanation:

[tex] m \: = \: -3/5 \: and \: b \: = \: -1/5[/tex]

Answer:

x=2

y=-1

Use the system of equations to solve for it

Answer:

?Incomplete question!!

By what means these algebraic expressions are related?

70 miles

Hope this helps

-Millie