can someone please help it’s for dance class not mathematics

Answer:

The missing variable r = 3

Step-by-step explanation:

C = 2πr

Where,

C = 18.84

π = 3.14

r= ?

The missing variable is r

C = 2πr

Making r the subject

r = C / 2π

= 18.84 / 2*3,14

= 18.84 / 6.28

= 3

r = 3

The missing variable r = 3

Check:

C = 2πr

18.84 = 2*3.14*3

18.84 = 18.84

Answer:

D.5

Step-by-step explanation:

You can write the following equations from the information given:

y=x+3 (1)

11x+5y=47 (2)

x is the number of hardback books

y is the number of paperback books

You can replace (1) in (2):

11x+5(x+3)=47

11x+5x+15=47

16x=47-15

16x=32

x=32/16

x=2

Then, you can replace the value of x in (1) to find the value of y:

y=2+3

y=5

According to this, the answer is that Jamal bought 5 paperback books.

10 ^-4

Use the negative exponent rule to get:

1/10^4 = 1/10,000 (fraction answer) or 0.0001 (decimal answer)

Answer:

6x +2x

Step-by-step explanation:

when the number= x, you can just form the equation as per usual. 6x = a number times 6; 2x = a number times 2.

x is used bc the number is an unknown value. only x can be used bc it is stated the same number. hsing different alphabets such as y or z indicates the unknown value ia different.

Answer:

[tex]x ^{2} + 8x + 12[/tex]

Step-by-step explanation:

This works because of the method called "foil"

Steps to solve:

g(x) = 3 - 2x when g(-1)

~Substitute

g(-1) = 3 - 2(-1)

~Simplify

g(-1) = 3 - (-2)

~Simplify

g(-1) = 3 + 2

~Add

g(-1) = 5

Best of Luck!

for that it is 3 x 3/7

Answer:

3 x 3/7 is the answer but on your paper u can just say D hope this helps

Answer:

x = 22.66

Step-by-step explanation:

Answer:

technically, unless it says somewhere that each ticket cost $1 none would be correct, but the answer your looking for is student B

Step-by-step explanation:

Answer:

im pretty sure student b is correct

because every 10 tickets they give away 5 dollars you replace y as 10 and 1/2 of 10 is 5 so you replace the 1/x with 5

btw im not 100%  sure im correct

Answer:     -20r + 40

Step-by-step explanation:

multiply by the variable

-20r + 40

-10 x 2r = -20r

-10 x -4 = 40

Answer:

the answer to your question is: -20r + 40

Answer:

see below (I hope this helps!)

Step-by-step explanation:

To get rid of the coefficient of w, 3/2 in this case, we must divide the entire equation by 3/2, which is the equivalent of multiplying the entire equation by 2/3. Doing this, we get:

3/2w * 2/3 = -20 * 2/3

w = -40/3 = [tex]-13\frac{1}{3}[/tex]

Answer:

95%

Step-by-step explanation:

One and a half hours is 90 minutes.  Going up from the 90 at the bottom, it crosses the line at about 95%.

Answer:

95%

Step-by-step explanation: I am pretty sure it is at least let me know if I am wrong

Answer:

6x-9

the- sign makes it a difference and the two terms are 6x and 9

Answer:

a.

Step-by-step explanation:

The volume of cube 4x².

Volume is a three-dimensional measurement that's used to gauge a solid shape's capacity. It implies that the volume of a closed form determines how much space it can occupy in three dimensions.

We have,

Edges of cube as = 4 , x and x.

So, volume of cube

= 4 x (x . x)

= 4 . x²

= 4x²

Thus, the volume of cube 4x².

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Answer:

bii) [tex] \frac{3118x^{2} }{1225} cm^{2} [/tex]

Please see the attached pictures.

*x represents the estimated distance on Map A

Answer:

The first two pairs of functions are inverse of each other

Step-by-step explanation:

Inverse functions?

1...................................

f(x) = {(-5, -9), (-3, -4), (0,1), (3,7), (6,13)}

g(x) = {(-9,-5), (-4, -3), (1,0), (7,3), (13,6)}

2...................................

f(x) = x + 7 is given

Inverse of f(x) is

Since g(x) = x - 7 it is inverse with f(x)

3...................................

Data of f(x) and g(x)

x = {2, 3, 4, 5}      f(x) = {3, 8, 15, 24}

x = {5, 4, 3, 2}      g(x) = {24, 15, 8, 3}

Answer:

2 9/50

Step-by-step explanation:

2.18

=>218/100

=>109/50

=>2 9/50

Answer:

2 9

/50

Step-by-step explanation:

Convert the decimal number to a fraction by placing the decimal number over a power of ten. Since there are  2  numbers to the right of the decimal point, place the decimal number over  10

^ 2

(

100

)

. Next, add the whole number to the left of the decimal.

2 18/100

Reduce the fractional part of the mixed number

2 9/50

Answer:

4+8 = 12 , 6-3 = 3 , 2 x 3 = 6 , 12/6 = 2

the answer is 2

The expression 4 + 8 / 2 x (6 - 3) is equivalent to 16.

The Bodmas rule is arranged according to the letters in the acronym BOD MAS, which stand for brackets, order of powers or roots, division, and multiplication. A stands for addition and S for subtraction. According to the BOD MAS rule, mathematical equations containing numerous operators must be resolved in the BOD MAS order, starting from the left.

The given expression is,

4 + 8 / 2 x (6 - 3)

Solve by using BODMAS rule,

4 + 8 / 2 x 3

Further solve,

4 + 4 x 3

4 + 12

16

The simplified value of the given expression is 16.

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x = -3

y = -4

Hope that helped :)

Answer:

Step-by-step explanation:

80% = 80/100 which also = 4/5

so the price was reduced by 4/5

20 minus 4/5 is = to  20 minus 16/20

which is 20/20 minus 16/20 = to 4/20

simplified is 4 dollars

Answer:

5.00

Step-by-step explanation:

Therefore, the square root of  [tex]25[/tex] so the square root of [tex]5.[/tex].

What is the square root?

A square root of a number [tex]x[/tex] is a number [tex]y[/tex] such that [tex]y = x[/tex]; in other words, a number [tex]y[/tex] whose square.

Here given number is [tex]25[/tex] so the square root of [tex]\sqrt{25}=5[/tex].

Hence, the square root of  [tex]25[/tex] so the square root of [tex]5.[/tex].

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Answer:

-720

Step-by-step explanation:

We are given the expression:

[tex]10x^3y^2[/tex]

and asked to evaluate when x= -2 and y= -3.

Therefore, we must substitute -2 for x and -3 for y.

[tex]10(-2)^3*(-3)^2[/tex]

Solve according to PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition, Subtraction.

Evaluate the first exponent.

⇒ (-2)³ = -2 * -2 * -2= 4*-2= -8

[tex]10(-8)*(-3)^2[/tex]

Evaluate the second exponent.

⇒ (-3)²= -3 * -3= 9

[tex]10(-8)*9[/tex]

Multiply 10 and -8.

[tex]-80*9[/tex]

Multiply -80 and 9.

[tex]-720[/tex]

The value of 10x³y² at x= -2 and y= -3 is -720

Answer:

Step-by-step explanation:

The questions is incomplete. Here is the complete question.

Points P,Q,R,and S are collinear. Point Q is between P and R, R is between Q and S where  PQ ≈ RS. If PS=25, and PR=19, what is the value of QR

If points P,Q,R,and S are collinear, this means that the four points lies on the same straight line.

If Point Q is between P and R, then PQ+QR = PR ........... 1

Also if R is between Q and S, then QR+RS = QS ...... 2

Given

PS=25

PR=19

RS = PS-PR

RS = 25-19

RS = 6

Since PQ ≈ RS

Hence PQ = RS = 6

From equation 1;

PQ+QR = PR

substituting the resulting values

6+QR = 19

QR = 19-6

QR = 13

Hence the value of QR is 13

Answer:

Make m the subject of the expression below; 3. Make v the subject of the relation; 4. Given that v 2 = u 2 + 2as, express a in terms of u, v and s. Hence, find the value of a when u = 15, v = 20 and s = 5. 5. An expression is given as.

Author: Toolbar

Step-by-step explanation:

Answer:

1.1k

Step-by-step explanation:

k+0.83k-0.73k

1.83k-0.73k

1.1k

Hope this helps ;) ❤❤❤

Answer:

m-30

Step-by-step explanation:

[tex]m + 40 - 70\\\\\mathrm{Add/Subtract\:the\:numbers:}\:40-70=-30\\=m-30[/tex]

Answer:

m - 30

I hope this helps!

Answer:

1,2

Step-by-step explanation:

Answer: Mrs Bell

Step-by-step explanation:

From the question, we are informed that Mrs. Bell has an interest rate of 4.175% = 0.04175 on her house and Mr. Bentley has an interest rate of 4.25% = 0.0425 on his house.

The person who has the lower interest is Mrs Bell. This is because 4.25% is higher than Mrs Bell's interest of 4.175%

Answer:

The answer is D

Step-by-step explanation:

Mrs bell has the lower interest rate because both decimals have a 4 in the ones place, and 1 tenth is less than 2 tenths.