I am a two digit number above 50. the sum of my digits is twelve and the difference of my digits is 4. who am I?​

Answer:

Look below

Step-by-step explanation:

2/3  -  1/4 = m

Hope this Helps!

4.2^n+12^n+2/2^n+12^n

Step-by-step explanation:

Answer:

50cm^2

Step-by-step explanation:

side length is square root 50 so you multiply  square root 50  by  square root 50 which gives you 50

Answer:

128√5/3 mm³

Step-by-step explanation:

Since we are not told what to find, we can as well look for the volume of the pyramid

Volume of a square pyramid: V = (1/3)a²h

a is the side length of the square

h is the height of the pyramid

Given

a = 8mm

l² = (a/2)² + h²

l² = (a/2)² + h²

6² = (8/2)² + h²

h² = 6² - 4²

h² = 36 - 16

h² = 20

h = √20

Volume of a square pyramid =  (1/3)*8²*√20

Volume of a square pyramid = 1/3 * 64 * 2√5

Volume of a square pyramid = 128√5/3 mm³

Answer:

-5,-2,2,5

Step-by-step explanation:

Answer:

129 cm

Step-by-step explanation:

The total height of all the people: 150 × 4 = 600 cm

The total height of Sally, Jackson and Tina: 145 × 3 = 435 cm

David’s height: 600 – 435 = 165 cm

Tina’s height: 165 + 5 = 170 cm

Jackson’s height: 170 × 4/5 = 136 cm

Therefore, Sally’s height: 600 – 165 – 170 – 136 = 129 cm

Thenks and mark me brainliest :))

The height of Sally will be 133 centimeters and the height of Jackson is 132cm.

The distribution of weights to the variables involved that establishes the equilibrium in the calculation is referred to as a result.

The average height of Sally, Jackson, Tina, and David is 150 cm per person. Then the equation is given as,

(S + J + T + D) / 4 = 150

S + J + T + D = 600  ...1

The average height of Sally, Jackson, and Tina is 145 cm per person. Then the equation will be

(S + J + T) / 3 = 145

S + J + T = 435      ...2

Tina is 5 cm taller than David. Then the equation will be

T = D + 5  ...3

Jackson is 4/5 as tall as David. Then the equation will be

J = (4/5)D    ...4

From equations, 1 and 2, then we have

435 + D = 600

D = 165 cm

From equation 4, then we have

J = (4/5) x 165

J = 132 cm

From equation 3, then we have

T = 165 + 5

T = 170 cm

From equation 2, then we have

S + 132 + 170 = 435

S = 133 cm

The height of Sally will be 133 centimeters.

More about the solution of the equation link is given below.

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Answer:

A sample size of 392 is required.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of [tex]\pi[/tex], and a confidence level of [tex]1-\alpha[/tex], we have the following confidence interval of proportions.

[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

In which

z is the zscore that has a pvalue of [tex]1 - \frac{\alpha}{2}[/tex].

The margin of error is:

[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

18% of students struggle in their classes because they don't spend more than 8 hours studying independently outside of a 4-unit class.

This means that [tex]\pi = 0.18[/tex]

99% confidence level

So [tex]\alpha = 0.01[/tex], z is the value of Z that has a pvalue of [tex]1 - \frac{0.01}{2} = 0.995[/tex], so [tex]Z = 2.575[/tex].

You would like to be 99% confident that your estimate is within 5% of the true population proportion. How large of a sample size is required?

A sample size of n is required.

n is found when M = 0.05. So

[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

[tex]0.05 = 2.575\sqrt{\frac{0.18*0.82}{n}}[/tex]

[tex]0.05\sqrt{n} = 2.575\sqrt{0.18*0.82}[/tex]

[tex]\sqrt{n} = \frac{2.575\sqrt{0.18*0.82}}{0.05}[/tex]

[tex](\sqrt{n})^2 = (\frac{2.575\sqrt{0.18*0.82}}{0.05})^2[/tex]

[tex]n = 391.5[/tex]

Rounding up:

A sample size of 392 is required.

Answer:

yes the triangle is a right angle

Step-by-step explanation:

hope it helps good luck

10

you 5×2=10

that how you get your answer

Answer:

25

Step-by-step explanation:

r = 6

19 + r

= 19 + 6

= 25

25 is the answer.

Answer:

The answer is 25

Step-by-step explanation:

19 + r; r = 6

19 + r

19 + 6 = 25

Thus, The answer is 25

-TheUnknownScientist

Answer:

F

Step-by-step explanation:

9514 1404 393

Answer:

  right triangle

Step-by-step explanation:

Segment P1-P2 is horizontal of length 2-(-4) = 6. Segment P2-P3 is vertical of length 1-(-3) = 4. The horizontal and vertical sides are perpendicular to each other, so it is a right triangle. The sides are of different lengths, so it is a scalene triangle (not isosceles).

Answer: skewed right

Step-by-step explanation:

Trust

The shape of the probability histogram of X is skewed right.

The correct answer is (B)

Skewness refers to a distortion or asymmetry that deviates from the symmetrical bell curve, or normal distribution, in a set of data.

As, English test has 50 multiple-choice questions, each with five answer choices and one correct answer.

Let X represent the number of questions answered correctly.

In statistics, a positively skewed (or right-skewed) distribution is a type of distribution in which most values are clustered around the left tail of the distribution while the right tail of the distribution is longer.

By looking the condition given in the questions, we can say that the shape will be skewed right on histogram.

Learn more about skewness here:

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Answer:

F

Step-by-step explanation:

9/15- ratio of two legs of the smaller triangle

13.5/x- ratio of two legs of the larger triangle

9/15= 13.5/x

cross multiply

9x= 202.5

x=22.5

Answer: Hello Luv.......

Factor the numerator and denominator and cancel the common factors.

−(81−1x+9x2)

Step-by-step explanation:

Hope this helps. Mark me brainest please.

Anna ♥

Answer:

Okay..

Step-by-step explanation:

Your are cunfoosing, help meh understand what ur sayin

9514 1404 393

Answer:

  A.  -6

Step-by-step explanation:

The average rate of change on that interval is given by ...

  m = (f(0) -f(-1))/(0 -(-1)) = f(0) -f(-1)

  m = -3 -(3) = -6

The average rate of change on the interval is -6.

Answer:

Step-by-step explanation:

Answer:

A right-tailed test should be used to test whether there evidence that the average strength of the new fishing line is greater than 15 kilogram.

Step-by-step explanation:

Type of procedure:

We want to test if the breaking strength is greater than a value, which means that the type of procedure used to solve this question is a right-tailed test, which is when we find the probability of having a mean higher than the sample mean found.

Other types of procedures:

Not related to this question speficially, but to similar problems.

To test if a measure is less than another measure, the procedure used is a left-tailed test.

To test if a measure is different from another measure, the procedure used is a two-tailed test.

Answer:

the answer is B

Step-by-step explanation:

subtract 33 from 90

Answer:

Step-by-step explanation:

Use two points:

The slope is:

Constant change is the slope, which is 1/2

Answer:

by taking two points

(4,2). & (12,6)

now slope

m=[tex] \frac{6- 2}{12 - 4} = \frac{4}{8}=\frac{1}{2} [/tex]=0.5

Answer: x = -30

Step-by-step explanation:

y = -20 by using process of elimination substitute y as -20 in either of the equations you get -30 for x

The solution to the system of equations is x = 390 and y = 50. The value of x is equal to 390.

To find the value of x, solve the system of equations using the method of  substitution . Let's use the method of elimination:

Given equations:

x - 12y = -210                      (1)

x - 6y = 90                          (2)

To eliminate x, we can subtract equation 2 from equation 1:

(x - 12y) - (x - 6y) = (-210) - 90

Simplifying the equation:

x - 12y - x + 6y = -210 - 90

-6y = -300

Divide both sides of the equation by -6:

y = -300 / -6

y = 50

Now, substitute the value of y back into either equation:

x - 6(50) = 90

Simplify the equation:

x - 300 = 90

Add 300 to both sides of the equation:

x = 90 + 300

x = 390

Therefore, the solution to the system of equations is x = 390 and y = 50.

Learn more about Substitution method here:

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Answer:

24

Step-by-step explanation:

First you start by writing down all the combinations that start with each number. Then you just write the left over numbers and you'll end up with 24 because the is six of each starting number. Ex: 123, 132, 134, 143, 124, 142...

Answer:

[tex] (A)\displaystyle \begin{array} {ccc} \displaystyle y = - 2 \\ x - 2y = 6\\ \end{array} [/tex]

Step-by-step explanation:

since the line is horizontal and passes -2 the equation of the blue line should be

[tex] \displaystyle \large y = - 2[/tex]

remember The form of equation of a line

[tex] \displaystyle \boxed{ \displaystyle y = mx + b}[/tex]

where m is slope of the line and b is the y-intercept we can clearly see that the red line crosses y-axis at (0,-3) therefore b=-3

to figure out m we can consider the following formula:

[tex] \displaystyle m = \frac{ \Delta y}{ \Delta x} [/tex]

from the graph we acquire ∆y=1 and ∆x=2

thus substitute:

[tex] \displaystyle m = \frac{ 1}{ 2} [/tex]

so we have figured out m and b

therefore our equation of blue line is

[tex] \displaystyle y = \frac{1}{2} x - 3[/tex]

our given options are in standard form so

move -3 to left hand side and change its sign:

[tex] \displaystyle y + 3= \frac{1}{2} x [/tex]

cross multiplication:

[tex] \displaystyle 2y + 6= x[/tex]

move 6 to right hand side and x to left hand side and change its sign

[tex] \displaystyle - x + 2y = - 6[/tex]

multiply both sides by -1:

[tex] \displaystyle x - 2y = 6[/tex]

hence, our system of linear equation is

[tex] \displaystyle \begin{cases} \displaystyle y = - 2 \\ x - 2y = 6\\ \end{cases}[/tex]

Answer:

about 23 minutes

Step-by-step explanation:

(65x35)/(65+35)= 2,275/100= 22.75 minutes (or 23 if rounded)

Answer:

47°

Step-by-step explanation:

the sum of total is 180

here if one is mentioned as 43 the other side is also 43

then, we get as 86 as we now found two side.

now 180-86=94

divide 94/3 and we get 47° is the answer.

PLEASE RECHECK THE ANSWER I HOPE ITS CORRECT

Answer:

Volume of a Cylinder:

In geometry, a cylinder is a three-dimensional shape with a circular base, a circular top and straight sides. It is the solid figure that you get when you rotate a rectangle about one of its sides. In most cases when we talk about the volume of a cylinder, we are talking about how much liquid it can hold.

The strictly correct way of saying it is "the volume surrounded by a cylinder" - the amount of liquid it holds. But many textbooks simply tell "the volume of a cylinder" to mean the same thing.

Remember that the radius and the height must be in the same units - convert them if necessary.

The resulting volume will be in those cubic units. So if the height and radius are both in centimeters, then the volume will be in cubic centimeters.

The volume of a cylinder is found by multiplying the area of its top or base by its height and is defined as: V = π· r2· h

Example 1: A cylindrical water storage tank has an inside base radius of 7m and depth of 11 m. Find the capacity of the tank in kiloliters (1kl = 1m3).

Solution:

Base radius: r = 7 m

Height: h = 11 m

The water storage tank is in the shape of the cylinder. So using the volume of cylinder formula we can find the volume of it.

V = π· r2· h

V = π· 72· 11

V = 1692.46 m3 = 1692.46 kl

Example 2: Find the volume of a cylinder whose base radius is 6 cm and height is 4 cm.

Solution:

Base radius: r = 6 cm

Height: h = 4 cm

V = π· r2· h

V = 3.14· 62· 4

V = 452.16 cm3

Example 3: If the capacity of a cylindrical tank is 1848 m3 and the diameter of its base is 14 m, find the depth of the tank.

Solution:

Let the depth of the tank be h metres. Then we have:

V = π· r2· h

h = V / π· r2

h = 12 m

Example 4: A conical vessel, whose internal radius and height is 20cm and 50 cm respectively, is full of liquid. Find the height of the liquid if it is put into a cylinder whose base radius is 10 cm.

Solution:

The volume of the vessel is:

V = π ∙ r2 ∙ h / 3

V = π · 202· 50 / 3

V = 20944 cm3

The volume of the liquid is the same no matter it is in the vessel or in the cylinder, therefore we have:

V1 = V2, where V1 is the volume of the vessel and V2 is the volume determined using the formula for a cylinder.

20944 = π · 102 · h

Thus:

h = 20944 / (π · 102)

h = 66.67 cm

Example 5: Find the volume of a right circular cylinder whose curved surface area is 2640 cm2

And the circumference of its base is 66 cm.

Solution:

To begin with we need to determine the base radius using the formula for circular perimeter (circumference).

P = 2 · π ·r

r = P /(2 · π) = 66 / (2 · π) = 10.50 cm

Now we will find the height of the cylinder using the formula for surface area of a cylinder.

SA = P · h

h = SA / P = 2640 / 66 = 40 cm

The volume of the cylinder is therefore:

V = π· r2· h

V = π· 10.502· 40

Answer:

9. you did that right.

10.

A. x=4

B. (4,4)

C. (-∞,-∞)

11. you did not do it right and I will screenshot the answer.

Step-by-step explanation:

a graphing calculator helps a bunch with these types of problems. if you dont have one use demos an online graphing calculator.

9514 1404 393

Answer:

  10. see attached

  11. axis of symmetry: x=4; vertex: (4, 4); domain: all real numbers; range: y ≤ 4

  12. x = -4, -2

Step-by-step explanation:

10. Your graph is substantially correct. (You might do yourself a favor by adding points ±1 either side of the vertex. This will help to make the graph more rounded near the bottom.) The red graph in the attachment is the graph of this function.

__

11. The vertex form of this equation is ...

  f(x) = -(x² -8x) -12 = -(x² -8x +16) -12 +16

  f(x) = -(x -4)² +4

This tells you the vertex is (4, 4). The axis of symmetry is the vertical line through the vertex, so is x=4. The domain of all polynomial functions is "all real numbers." This has a maximum at y=4, so the range is y ≤ 4.

__

12. The vertex form of this equation is ...

  f(x) = (x +3)² -1

so the vertex is (-3, -1). Points at x = -3 ± 1 will be the x-intercepts, so the solutions to the equation f(x) = 0. The graph of it is the green graph in the attachment.

Answer:

? sorry what?

Step-by-step explanation: