2. A circular clock face has a diameter of 31 cm. What is the area of the
clock face?
A. 754.4 cm2
B.
3017.5 cm2
48.7 cm2
D.
961 cm2​

Answer:

x =  0.35   or x = -11.35

Step-by-step explanation:

Points to remember

Solution of a quadratic equation ax² + bx + c = 0

x = [-b ± √(b² - 4ac)]/2a

It is given that,  x² = –11x + 4

x² + 11x - 4 = 0

To find the solution

Here a = 1, b = 11 and c = -4

x = [-b ± √(b² - 4ac)]/2a

x = [-11 ± √(11² - 4 * 1 * (-4))]/2*1

 =  [-11 ± √(121 + 16)]2

 = [-11 ± √137]/2

 = [-11 ± 11.70]/2

x = -11 + 11.70  or x = -11 - 11.70

x =  0.35   or x = -11.35

Final answer:

The expression (3x²y³) ³ is found by cubing the coefficient and multiplying each variable's exponent by 3, which results in 27x⁶y⁹.

Explanation:

When we deal with the cubing of exponentials, as in the expression (3x²y³) ³, both the numerical coefficient and the variables with their exponents are raised to the power of 3. The rules of exponents guide us to cube the number 3 and multiply the exponents of x and y by 3.

To cube the number 3, we would calculate 3³, which equals 27. For the variables, we apply the exponent to each exponent: x raised to the 2³ (which is 6) and y raised to the 3³ (which is 9). Hence, the expression (3x²y³) ³ simplifies to 27x⁶y⁹. This demonstrates that when cubing an exponential expression, we obtain a new exponent for each variable by multiplying the original exponent by 3, and we cube the numerical coefficient as well.

Answer:

Step-by-step explanation:

I'm not sure I know what the paper ball situation is, but I can tell you that especially when working with a set formula in physics, math or chemistry (I'd include biology if I knew any biology) that it is a good idea to write down your givens.

The equation you are given is going to fall apart once you know what your givens are and what they do.

I just looked up the Paper Ball Situation. This is a wonderful piece of physics. It immediately opened up all sorts of treasures once they experimenters thought of using tin foil. Givens are a necessity in such an experiment.

Answer:

It was helpful because it breaks things up for a better understanding.

Step-by-step explanation:

Answer:

The answer is length: 9, width: 5

Step-by-step explanation:

5 x 9 = 45

5 x 4 = 20

20 - 11 = 9

Hope this helps :P

The length of a rectangle is 9 cm and width of the rectangle is 5 cm.

The area of Rectangle is length times of width.

Length of a rectangle is 11 centimeters less than four times its width.

Length=4W-11

Width=W

Area=45

Area=Length×Width

=(4w-11)w

45=4w²-11w

4w²-11w-45=0

After applying a =4, b=-11 and c=-45 in the quadratic formula

we get w=5

Plug in the value of w in length

Length=4W-11

=4(5)-11

=20-11

=9

Hence, the length of a rectangle is 9 cm and width of the rectangle is 5 cm.

To learn more on Rectangle click:

https://brainly.com/question/20693059

#SPJ2

Answer:

Q1: 11x - 8

Q2: 2x + 10

Q3: -3v + 12

Answer:

Q1: 11x + 8

Q2: 2x + 10

Q3: 3v - 12

ANSWER

The vertex of g(x) is (2,-5).

EXPLANATION

The given function is:

[tex]g(x) = 3 {x}^{2} - 12x + 7[/tex]

The vertex form of this function is:

[tex]g(x) = 3 {(x - 2)}^{2} -5[/tex]

This is of the form

[tex]g(x) = a {(x - h)}^{2} + k[/tex]

where (h,k) is the vertex.

When we to

[tex]g(x) = 3 {(x - 2)}^{2} -5[/tex]

h=2 and k=-5

The vertex of the parabola is (2,-5).

Step 1: Make a proportion by setting [tex]\frac{1}{9}[/tex] equal to [tex]\frac{x}{27}[/tex]

[tex]\frac{1}{9} = \frac{x}{27}[/tex]

Step 2: Cross multiply (27 will be multiplied by its diagonal which is 1. 9 will be multiplied by its diagonal which is x)

27 × 1 = 9x

27 = 9x

Step 3: Isolate x by dividing 9 to both sides

[tex]\frac{27}{9} = \frac{9x}{9}[/tex]

3 = x

^^^This means that the numerator is 3!

so...

[tex]\frac{1}{9} = \frac{3}{27}[/tex]

Hope this helped!

Answer:

3/27

Step-by-step explanation:

1/9 is equal to 3/27 how i got my answer was going threw all of the equivlent fractions to get to 3/27

you can also do for the numerator is 1x1=1 then the denominator 9x1=9

that is 1/9 then you go down the line

numerator= 1x2=2 -------  

denominator=9x2=18------> 2/18

numerator=1x3=3

denominator= 9x3=27------> 3/27

sorry if its confusing but you should see the pattern

Answer:

False

Step-by-step explanation:

Continuous data is data that can take any value within a range, including non-whole number values.

Because the number of tickets sold can only take whole number values, it is not an example of continuous data.

False

I hope this helps you understand continuous data. Have a great day. :)

Answer: False

Step-by-step explanation: Continuous data is data that can be measured. The number of tickets that were sold would only be positive integers meaning that there can't be a fraction of a ticket sold. Since discrete data is data that can be counted, the number of tickets sold would be an example of data that is discrete.

the answer is c

hope this would help you

Answer:

[tex]y=-2x^2 -16x -28[/tex]

Step-by-step explanation:

We are given with the graph of a parabola

[tex]y=-2x^2 + 3x -5[/tex]

a=-2, b=3 and c=-5

Discriminant = [tex]b^2-4ac= 3^2 -4(-2)(-5)= 9-40= -31[/tex]

Discriminant is negative so x intercepts are imaginary.

In the graph we have two x intercepts.

[tex]y=-2x^2 -4x -2[/tex]

a=-2, b=-4 and c=-2

Discriminant = [tex]b^2-4ac= (-4)^2 -4(-2)(-2)=0[/tex]

Discriminant is 0 so there is only one x intercept

[tex]y=-2x^2 -16x -28[/tex]

a=-2, b=-16 and c=-28

Discriminant = [tex]b^2-4ac= (-16)^2 -4(-2)(-28)=32[/tex]

Discriminant is positive so there  are two x intercepts

[tex]x=\frac{-b+-\sqrt{b^2-4ac} }{2a} =\frac{16+-\sqrt{32} }{2(-2)}[/tex]

We will get two values for x

x= -5.414  , x=-2.586

Two x intercepts are negative . That is the x intercepts of given graph.

[tex]y=-2x^2 +16x -28[/tex]

a=-2, b=16 and c=-28

Discriminant = [tex]b^2-4ac= (16)^2 -4(-2)(-28)=32[/tex]

Discriminant is positive so there  are two x intercepts

[tex]\bf \begin{cases} \boxed{y}=6x-11\\ \cline{1-1} -2x-3y=-7 \end{cases}\qquad \implies \stackrel{\textit{substituting \underline{y} in the 2nd equation}}{-2x-3\left( \boxed{6x-11} \right)=-7}[/tex]

[tex]\bf -2x-18x+33=-7\implies -20x+33=-7\implies -20x=-40 \\\\\\ x=\cfrac{-40}{-20}\implies \blacktriangleright x=2 \blacktriangleleft \\\\[-0.35em] ~\dotfill\\\\ \stackrel{\textit{since we know that }}{y=6x-11}\implies y=6(2)-11\implies y=12-11\implies \blacktriangleright y=1 \blacktriangleleft \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ ~\hfill (2,1)~\hfill[/tex]

Step 1: Plug 6x - 11 in for y in the equation -2x - 3y = -7

-2x - 3(6x-11) = -7

Step 2: Distribute -3 to the numbers inside the parentheses (6x -11)

-2x - 18x + 33 = -7

Step 3: Combine like terms

x's go with x's

-20x + 33 = -7

Step 4: Subtract 33 to both sides

-20x = -40

Step 5: Isolate x by dividing -20 to both sides

x =  2

Step 6: To solve for y plug 2 in for x in the equation y = 6x - 11

y = 6(2) - 11

y = 12 - 11

y = 1

(2, 1)

Check:

1 = 6(2) - 11

1 = 12 - 11

1 = 1

-2(2) - 3(1) = -7

-4 - 3 = -7

-7 = -7

Hope this helped!

30 seconds/per burger

Answer:

30 seconds

Step-by-step explanation:

4 burgers in 2 mins

1 burger

= 2 ÷ 4

= 0.5 min

= 30 seconds

Answer:

180.5 in²

Step-by-step explanation:

The area (A) of a kite is calculated as

A = [tex]\frac{1}{2}[/tex] × d₁ × d₂ ← the 2 diagonals

d₁ = 2 × 9.5 = 19 in and d₂ = 12 + 7 = 19 in

A = 0.5 × 19 × 19 = 180.5 in²

180.5 is the answer !

Answer:

Total Area = height * width + height * length + width * length

Total Area = 3.8 * 4 + 3.8 * 5.5  + 4 * 5.5 =

15.2 + 20.9 + 22 =

58.1 square units

Step-by-step explanation:

Answer:

14

Step-by-step explanation:

Rewriting this as

-8      -7

----- · -----

 1         4

makes this problem a bit easier to do.  Reduce the -8/4 to -2:

-8      -7       -2(-7)

----- · ----- = ----------- = 14

 1         4           1

Answer:

Amount invested at 6 percent interest is $69,200

Amount invested at 9 percent interest is $34,600

Step-by-step explanation:

Let the amount invested (or principal) at 6 percent interest be $2x

The principal(P) (amount invested) at 9 percent interest will be $x

Amount(A) = P(1 + rt)

Time(t) = one year = 1

Amount at 6% interest = 2x(1 + 0.06) = $2.12x

Interest accumulated = Amount - Principal = $2.12x - $2x = $0.12x

Amount at 9% interest = x(1 + 0.09) = $1.09x

Interest accumulated = Amount - Principal = $1.09x - $x = $0.09x

Total interest = $7,266

So, $0.12x + $0.09x = $7,266

$0.21x = $7,266

x = [tex]\frac{7,266}{0.21}[/tex] = $34,600

The principal (amount invested) at 9 percent interest rate is $34,600

The principal (amount invested) at 6 percent interest rate is 2 × $34,600 = $69,200

V= length x width height.

5/3 x 1/4 x 3/2

15 /24 or 5/8

Answer:

If x = 20, then y = 12.5/20 = 0.625

Step-by-step explanation:

The pertinent relationship is y = k/x, where k is the constant of proportionality.

Subbing 5 for y and 2.5 for x yields 5 = k/2.5, so k = 12.5.

Then the specific relationship fit to this problem is y = 12.5/x.

If x = 20, then y = 12.5/20 = 0.625

Around 58 book covers

Answer:

[tex]\large\boxed{A=25\pi}[/tex]

Step-by-step explanation:

The formula of an area of a circle:

[tex]A=\pi r^2[/tex]

r - radius

We have r = 5. Substitute:

[tex]A=\pi(5^2)=25\pi[/tex]

ans:-7.54

do u understand

Answer:

-7.44

Step-by-step explanation:

Just do it out

the square root is 13.7 hope this helps!

[tex] \sqrt{ - 188} = 13.7113092 \: i[/tex]

hope that helped you!

Answer:

hello : x = - 4 or x = - 8

Step-by-step explanation:

x²+12x+32=0​

(x² +2(6)(x) +6²) - 6² +32 = 0....by completing the square

(x + 6 )²- 2² = 0

(x+6-2)(x+6+2)=0 by idetity : a² - b² = (a - b ) ( a + b )

(x+4)(x+8) =0

x+4=0 or x+8= 0

x = - 4 or x = - 8

Answer:

x = - 8, x = - 4

Step-by-step explanation:

Given

x² + 12x + 32 = 0 ( subtract 32 from both sides )

x² + 12x = - 32

To complete the square

add (half the coefficient of the x- term)² to both sides

x² + 2(6)x + 6² = - 32 + 6²

(x + 6)² = - 32 + 36 = 4

Take the square root of both sides

x + 6 = ± 2 ( subtract 6 from both sides )

x = - 6 ± 2

Hence

x = - 6 - 2 = - 8

x = - 6 + 2 = - 4

Answer:

(-7,-5)

Step-by-step explanation:

Converting the circle into the form (x-h)^2+(y-k)^2=r^2, we get

x^2+14x+49+y^2+10y+25=7+25+49

So we get

(X+7)^2+(y+5)^2=81

So the center of the circle is (-7,-5)

Answer:

centre = (- 7, - 5)

Step-by-step explanation:

The equation of a circle in standard form is

(x - h)² + (y - k)² = r²

where (h, k) are the coordinates of the centre and r is the radius

Arrange the equation by placing the x and y terms together

x² + 14x + y² + 10y - 7 = 0 ( add 7 to both sides )

x² + 14x + y² + 10y = 7

Use the method of completing the square

add (half the coefficient of the x/y term)² to both sides

x² + 2(7)x + 7² + y² + 2(5)y + 5² = 7 + 7² + 5²

(x + 7)² + (y + 5)² = 7 + 49 + 25 = 81 ← in standard form

with (h, k) = (- 7, - 5) ← centre of circle

Answer:

Step-by-step explanation:

From the net:

S.A. = 2(25 in²) + 4(60 in²) = 50 in² + 240 in² = 290 in²

From the model:

The formula of a Surface Area of a rectangular prism:

S.A. = 2(lw + lh + wh)

l - length

w - width

h - height

We have l = 5 in, w = 5 in, and h = 12 in. Substitute:

S.A. = 2(5 · 5 + 5 · 12 + 5 · 12) = 2(25 + 60 + 60) = 2(145) = 290 in²

Answer: 290 in.^2

Step-by-step explanation: Just did on iready. Hope i helped! (:

ANSWER

[tex] \frac{1}{2} [/tex]

EXPLANATION

The given expression is;

[tex]2 {x}^{ - 4} y[/tex]

We want to find the value of this expression when x=2 and y=4.

We substitute to get,

[tex]2 {(2)}^{ - 4} (4) [/tex]

[tex]8 \times {2}^{ - 4} [/tex]

Recall that

[tex] {a}^{ - m} = \frac{1}{ {a}^{m} } [/tex]

This implies that,

[tex]8 \times {2}^{ - 4} = 8 \times \frac{1}{ {2}^{4} } [/tex]

[tex]8 \times {2}^{ - 4} = 8 \times \frac{1}{16 } = \frac{1}{2} [/tex]

Answer:

Step-by-step explanation:

Answer:

h = 3πx

Step-by-step explanation:

The volume (V) of the cylinder is calculated using the formula

V = πr²h ( r is the radius and h the height )

V = π × x² × 3x = 3πx³

The volume of the cuboid therefore has volume of 3πx³, that is

x × x × h = 3πx³

x²h = 3πx³ ( divide both sides by x² )

h = 3πx³ ÷ x² = 3πx

Answer:

False

Step-by-step explanation:

The distance between two points is found by

d = sqrt((y2-y1)^2 + (x2-x1)^2)

  = sqrt( (4-7)^2 + (6-2)^2)

  =sqrt( 3^2 +4^2)

  = sqrt(9+16)

  =sqrt(25)

  = 5

Answer:

False

Step-by-step explanation:

Because....

* Hopefully this helps:) Mark me the brainliest:)!!!

∞ 234483279c20∞

Answer:

[tex]-2\frac{2}{3} y^{2} -1\frac{8}{9}y -3\frac{1}{9}[/tex]

Step-by-step explanation:

Answer:

Step-by-step explanation:

If AB is parallel to XY, then they have the same slope.

If the slope of AB is 2/3, then the slope of XY is 2/3 too.

Answer:

23

Step-by-step explanation:

put 3 in place of x and solve.

Answer:

f(3) = 23

Step-by-step explanation:

To evaluate f(3) substitute x = 3 into the expression

f(3) = 2(3)² + 5[tex]\sqrt{3-2}[/tex]

     = (2 × 9) + (5 × [tex]\sqrt{1}[/tex])

    = 18 + (5 × 1) = 18 + 5 = 23