how to calculate the mean in statistics?​

Answer:

60%

Step-by-step explanation:

Answer:

A≈0.72in²

Using the formulas

A=πr2

C=2πr

Solving for A

A=C2

4π=32

4·π≈0.7162in²

Answer:

Blue = 116 m^2

Step-by-step explanation:

The area of the path and the square  =  30*30 = 900 m^2

The size of the square = 30 - 2 = 28. The square = 28^2 = 784

The path takes up the difference between the two 900 - 784 = 116

1.5x / 7 = 6.3 / 5

7.5x / 35 = 44.1 / 35

x = 44.1/7.5

x = 5.88

Answer:

x = 18

Step-by-step explanation:

Since these triangles are similar, we can set up the following proportion:

[tex]\frac{8+12}{12} = \frac{30}{x}[/tex]

[tex]\frac{20}{12} = \frac{30}{x}[/tex]

Cross multiply:

20x = 360

Divide:

x = 18

Check our work:

We can check our work by plugging 18 back into the proportion and seeing if it makes sense:

[tex]\frac{20}{12} = \frac{30}{18}\\\\\frac{20}{12} = 1\frac{2}{3}\\\\\frac{30}{18}= 1\frac{2}{3}[/tex]

It works ✓

Have a nice day!

     I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

- Heather

Answer:

6

Step-by-step explanation:

-2a+9=-3

-2a=-3-9

-2a=-12

2a=12

a=12/2

a=6

Answer:

a = 6

Step-by-step explanation:

-2a + 9 = -3

Subtract 9 from both sides,

-2a = -12

Divide -2 on both sides  (Negatives cancel out)

a = 6

Hope this helped :)

Answer:

100n+50

Step-by-step explanation:

100n is determined by how many cavities are found, dependant

50 is based on the base level cost of the appointment, independent

Answer:

1/4

Step-by-step explanation:

Answer:

12 nickels and 13 dimes

Step-by-step explanation:

d = # of dimes

n = # of nickels

Set up a System of Equations as follows:

d + n = 25

.10d + .05n = 1.90

now solve for 'd' or 'n' and use Substitution:

d = 25-n

.10(25-n) + .05n = 1.90

2.5 - .10n + .05n = 1.90

-.10n + .05n = -0.6

-.05n = -0.6

n = -0.6/-.05

n = 12

d + 12 = 25

d = 13

Check:   12(.05) + 13(.10) should equal 1.90

0.60 + 1.30 = 1.90

1.90 = 1.90

Answer:

Mike has 13 dimes and 12 nickels.

Step-by-step explanation:

Topic: System of Equations

Let:     d = # of dimes

           n = # of nickels

System of equations:

[tex]\left \{{d + n= 25} \atop {10d + 5n = 190}} \right.[/tex]

The method I am using today is the Substitution Method.

Substitution Method

Step 1: Solve for d

I am going to solve for one variable, d, from the top equation

Isolate d

Step 2: Plug in the value for d in the other equation

Now, we plug in d = 25 - n for 10d

Step 3: Solve for n

Now we have an equation with 1 variable, we can solve for that variable.

Step 4: Solve for d

Now, all we have to do is plug in "n" into an original equation

Mike has 13 dimes and 12 nickels.

-Chetan K

Answer:

a

Step-by-step explanation:

The intercepted arc BC is twice the measure of the inscribed angle BDC ,so

arc BC = 2 × 48° = 96°

Answer: The answer is 3/8.

Learn how to add and subtract fractions

Khan Academy Video: Adding and subtracting fractions

The value of expression in fraction form is,

⇒ 3/8

Subtraction in mathematics means that is taking something away from a group or number of objects. When you subtract, what is left in the group becomes less.

Given that;

The expression is,

⇒ 7/8 - 1/2

Now, We can simplify as;

⇒ 7/8 - 1/2

⇒ (7 - 4) / 8

⇒ 3 / 8

Thus, The value of expression in fraction form is,

⇒ 3/8

Learn more about the subtraction visit:

https://brainly.com/question/17301989

#SPJ5

Answer: 7.2

Step-by-step explanation: Cuz 5.6+12.9=18.5, 18.5-11.3=7.2

The missing number is 7.2.

We have the following expression.

5.6 + 12.9 = 11.3 + x

We have to find x.

Decimal numbers include those numbers which have a whole number and the fractional part separated by a decimal point.

According to the question -

5.6 + 12.9 = 11.3 + x

x = 18.5 11.3 = 7.2

Hence, the missing number is 7.2

To solve more questions on Decimal numbers, visit the link below-

brainly.com/question/4708407

#SPJ2

f^-1(x) =1/2x-3/2

f(x) = 2x + 3

f(x) - 3 = 2x

f(x)/2 - 3/2 = x

change x to f^-1(x) and f(x) to x

Answer:

0.04kg

Step-by-step explanation:

Kinetic energy Formula: eK=0.5×m×v²

to work out mass

we can rearrange the formula and make it:

~m=eK÷(0.5×v²)

now insert the missing digits into the formula:

m=200÷(0.5×100²)

work it out, and you get your answer

m=0.04kg

Hopefully this helped-have a good day)

Answer:

[tex]\displaystyle \\\left(\frac{49}{900},\frac{3761}{900}\right)[/tex] or approximately (0.544, 4.179)

Step-by-step explanation:

A function and its tangent lines intersect when their slopes are the same. Find the x-coordinate when the slope of f(x) is equal to 8/7 by taking the derivative of f(x):

[tex]\displaystyle\\f(x)=\sqrt{x}-x+4\\f'(x)=\frac{1}{2}\cdot\frac{1}{\sqrt{x}}-1=\frac{1}{2\sqrt{x}}-1[/tex]

Set [tex]f'(x)[/tex] equal to 8/7 and solve for x:

[tex]\displaystyle \\\frac{1}{2\sqrt{x}}-1=\frac{8}{7},\\x=\frac{49}{900}[/tex]

Therefore, [tex]f(x)[/tex] will intersect at a point of tangency with a line of slope 8/7 at x=49/900. Plug in x=49/900 into [tex]f(x)[/tex] to get the y-coordinate:

[tex]\displaystyle\\y=\sqrt{x}-x+4 \vert_{x=49/900}=\frac{3761}{900}[/tex]

⇒Answer: (49/900, 3761/900) or approximately (0.544, 4.179)

Answer:

it's 16,-8

Step-by-step explanation:

other dude is way off, by the way, 49/900 isn't approximatley .544, its .054

Answer:

a) 7x-5

b )7(100)-5 = 695

Answer:

$55.10

Step-by-step explanation:

subtract 2.55 and 57.45

Answer:

[tex]x=-\frac{5}{2}[/tex]

Step-by-step explanation:

[tex]2^{2x}=\frac{1}{32}[/tex]

[tex]2^{2x}=\frac{1}{2^5}[/tex]

[tex]2^{2x}=2^{-5}[/tex]

[tex]2x=-5[/tex]

[tex]x=-\frac{5}{2}[/tex]

Answer:

x= 1/128

Step-by-step explanation:

Evaluate 2^2x= 1/32

4x=1/32

divide

4x=1/32

4x/4= 1/32/4

simplify

x=1/128

Answer:

98

Step-by-step explanation:

the answer is 98

Answer:

98

Step-by-step explanation:

I got the answer 98, so I assume it might be correct.

104/-120

=-13/15

Devishri1977 gave a better example of how she got to the answer

Answer:

-13/15

Step-by-step explanation:

104/-120 should be reduced to lowest term and - should be in the numerator

[tex]\dfrac{104}{-120}= -\dfrac{2*2*2*13}{2*2*2*3*5}=\dfrac{-13}{15}[/tex]

Answer:

(6*10)/5

= 60/5

= 12

Step-by-step explanation:

Answer:

12

Step-by-step explanation:

6x / y

Let x = 10 and y = 5

6*10 / 5

60/5

12

Answer: I can barley see -_-

Step-by-step explanation:

3.26d + 9.75d − 2.65 = 13.01d - 2.65

Answer:

y = 567

Step-by-step explanation:

y = x^2

y = kx^2 ........k is constant

112 = k * 4^2

k = 112/ 4^2

k = 7

so,

y = x^2

if x = 9

then,

y = 7 * 9^2

y = 567

Answer:

5/6

Step-by-step explanation:

(1/5)/(2/3)=(1/4)/m

(1/5)(3/2)=(1/4)(1/m)

3/10=1/4m

cross product

10*1=3*4m

10=12m

m=10/12

simplify

m=5/6

Answer:

[tex]\frac{3}{14}[/tex]

Step-by-step explanation:

[tex]\frac{3}{10} \times \frac{5}{7} =\frac{3 \times 5}{10 \times 7}=\frac{15}{70}= \frac{3}{14}[/tex]

Answer:If number 1 is (5x+10=15) then the answer is x=1

            If number 2 is (2x-5=5x+4) then the answer is x= -3

Step-by-step explanation:

how to solve number 1 is by subtracting 10 from both sides

5x+10-10=15-10

5x=5

next divide both sides by 5

Answer:

She earned 1140 in simple interest.

Step-by-step explanation:

9500 * 1.12 = 10640

10640 - 9500 = 1140

Answer: The answer is 4x^4 to the cube root of 2x^2

Brainliest plss!

Answer:

x = 13

Step-by-step explanation:

As given , the triangle is right angle . So we can use

Pythagoras theorem

       ⇒  a² = b² + c²

            a² = (12)² + (5)²

           a² = 144 + 25

          a² = 169

           After taking square root

            a = 13

    So  

         x = 13