Which one is it? Please help me!!!!

Answer:

10.68%

Step-by-step explanation:

Total no of racers = 290

No of racers that completed the race = 259

No of racers that gave up = 28

No of racers that were disqualified = 3

No of racers that did not complete the marathon = 28 + 3 = 31

We need to find the percentage of the racers did not complete the marathon. It can be given by :

[tex]\%=\dfrac{\text{No of racers that did not complete the marathon}}{\text{Total no of racers}}\times 100\\\\=\dfrac{31}{290}\times 100\\\\=10.68\%[/tex]

So, the percentage of the racers that did not complete the marathon is 10.68%.

Question:

Consider the following quadratic function. f(x) = −9x^2 + 16x − 13.

Identify the vertex

Answer:

[tex](\frac{8}{9},-\frac{53}{9})[/tex]

Step-by-step explanation:

Given

[tex]f(x) = -9x^2 + 16x - 13[/tex]

Required

Identify the vertex

The vertex of an equation is represented as:

[tex](x,f(x)) = (\frac{-b}{2a},f(x))[/tex]

i.e.

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

In [tex]f(x) = -9x^2 + 16x - 13[/tex]

[tex]a= -9[/tex]    [tex]b = 16[/tex]   [tex]c = -13[/tex]

[tex]x = -\frac{b}{2a}[/tex] becomes

[tex]x = -\frac{16}{2 * -9}[/tex]

[tex]x = \frac{16}{2 * 9}[/tex]

[tex]x = \frac{8}{9}[/tex]

Substitute 8/9 for x in [tex]f(x) = -9x^2 + 16x - 13[/tex]

[tex]f(8/9) = -9(8/9)^2 + 16(8/9) - 13[/tex]

[tex]f(8/9) = -9(64/81)+ (16*8/9) - 13[/tex]

[tex]f(8/9) = -64/9 + (128/9) - 13[/tex]

Take LCM

[tex]f(\frac{8}{9}) = \frac{-64 + 128 -117}{9}[/tex]

[tex]f(\frac{8}{9}) = \frac{-53}{9}[/tex]

[tex]f(\frac{8}{9}) = -\frac{53}{9}[/tex]

Hence, the vertex is:

[tex](\frac{8}{9},-\frac{53}{9})[/tex]

Answer:

[tex]x\in (-\infty , -4) \cup (-2,+\infty)[/tex]

Step-by-step explanation:

Solve the system of inequalities:

x + 4 < 0

OR:

6x > -12

The first inequality yields the solution:

x < -4

The second inequality gives the solution:

x > -2

The total solution is the disjunction of the individual solutions, i.e., the union of both.

It can be expressed as

[tex]\mathbf{x\in (-\infty , -4) \cup (-2,+\infty)}[/tex]

Answer:

Number 4 (54,811 x two fourths)

Step-by-step explanation:

54,811 x 2 = 109622

54,811 x one and two fourths = 82216.5

54,811 x 1 = 54811

54,811 x two fourths = 27405.5

The first, second, and third are 54811 multiplied by a number that is greater than or equal to 1. When a number is multiplied by something greater than 1, it gets bigger, and when multiplied by 1 it stays the same. The one where you have to mulitply by two fourths is multiplying by less than 1, so it gets smaller.

Answer:

The perimeter of the p triangle = 38.4 cm

Step-by-step explanation:

Given

The perimeter of a triangle z be = 48 cm

The triangle is dilated by a scale factor of 0.8

To determine

What is the perimeter of the triangle after it is dilated by a scale factor of 0.8?

The new perimeter of the triangle p can be calculated by multiplying the perimeter of the original triangle z by 0.8

i.e.

Perimeter of triangle p = 48 × 0.8 = 38.4 cm

Therefore, the perimeter of the triangle p is = 38.4 cm

Answer:

Coordinates of B' → (7.5, 35.5)

Step-by-step explanation:

Rule for the dilation of a point with a scale factor 'k' about the origin,

(x, y) → (kx, ky)

By this rule coordinates of the image point B' when scaled by a scale factor of 2.5,

B(3, 15) → B'(2.5 × 3, 2.5 × 15)

            → B'(7.5, 37.5)

Therefore, coordinates of point B' → (7.5, 35.5)

Answer:

okhgxghhdhdhjjdhdhdhhhdhdbx

Answer:

x=76 degrees

Step-by-step explanation:

x+59=135

    -59   -59

x=76

i am 90% positive this is how you do it. Hope this helps! Happy holidays!!

Answer:

-5,-11 because it satisfies both equations

Step-by-step explanation:

Plug -5 into both equations and you get -11

Answer:

[tex]P(Red\ and\ Red) = \frac{4}{25}[/tex]

Step-by-step explanation:

Given

[tex]Yellow = 5[/tex]

[tex]Red = 4[/tex]

[tex]Purple = 1[/tex]

[tex]Total = 10[/tex]

Required

Determine the probability of selecting red, twice

Since it is a probability with replacement, the probability can be represented as:

[tex]P(Red\ and\ Red) = P(Red) * P(Red)[/tex]

And this is calculated as follows:

[tex]P(Red\ and\ Red) = \frac{n(Red)}{Total} * \frac{n(Red)}{Total}[/tex]

[tex]P(Red\ and\ Red) = \frac{4}{10} * \frac{4}{10}[/tex]

[tex]P(Red\ and\ Red) = \frac{2}{5} * \frac{2}{5}[/tex]

[tex]P(Red\ and\ Red) = \frac{4}{25}[/tex]

3 remainder of 7 i fink

Step-by-step explanation:

Answer:

I think its 6.40 but I'm not sure.

Answer:

linear

Step-by-step explanation:

linear would be a straight line, while nonlinear is like a curve of any type.

Answer:

Step-by-step explanation:

If Q is the midpoint of PR and PQ is 19, that means that QR is also 19 and the total length of PR is 38. Therefore,

PQ + QR = PR and

19 + 19 = 8x + 14 and

38 = 8x + 14 and

24 = 8x so

x = 3

Your choice is C

Q is the midpoint of the segment PR,

Since, Q is the midpoint of the segment PR,

PQ = QR = 19 units

By segment addition postulate,

PQ + QR = PR

Now substitute the values of the segments in the expression,

19 + 19 = (8x + 14)

38 = 8x + 14

8x = 38 - 14

8x = 24

x = 3

Therefore, value of x will be 3.

Option C will be the correct option.

Learn more,

https://brainly.com/question/4680922

Answer:

third // C

Step-by-step explanation:

Answer:

7 x ( 5 − 4 y )

Answer:

3. 2/10 4/20 3/15

4. 12/1 48/4 36/3

Step-by-step explanation:

Answer:

x = 18

Step-by-step explanation:

There's a line though all of the sides, so I'm going to assume that all sides are congruent.

Therefore

24 = 2x-12

add 12 to both sides

36 = 2x

divide by 2

x = 18

Answer:

about 20.5 hours

Step-by-step explanation:

first find out how much money he earned during the week by subtracting the friday balance and the monday balance

375.75 - 83.50 = $292.25 was the amount earned during the week

divide the amount earned by the amount earned per hour

292.25 / 14.25 ≈ 20.5 hours worked that week

hope this helps <3

Answer:

59.5

Step-by-step explanation:

To find the answer, multiply 17% by 350

17% = 0.17

0.17 x 350 = 59.5

Answer:

r= 20 units

theeta= 46

L= 2πr* theeta/360

L

L = 160 units

The length of arc is 16.049 unit.

An "arc" in mathematics is a straight line that connects two endpoints. An arc is typically one of a circle's parts. In essence, it is a portion of a circle's circumference. A curve contains an arc.

We have,

m <STU = 46

and ST = 20 units

So, length of Arc

= 46/ 360 2πr

= 46/360 x 2 (3.14)(20)

= 16.0488 unit

Thus, the length of Arc is 16.0488 unit.

Learn more about Arc here:

https://brainly.com/question/18741430

#SPJ2

Answer:

$56.50 in total.

Step-by-step explanation:

The answer is 56.50 because 5% of 45.20 is 2.26 and 20% of 45.20 is 9.04. So, 45.20 plus 2.26 and 9.04 is 56.50.

P.S Can I have brainliest?

Answer:

$56.50 is the total you spend on a car wash.

Step-by-step explanation:

5% of $45.20 = $2.26

20% of $45.20 = $9.04

$9.04 + $2.26 = $11.30

$45.20 + $11.30 = $56.50

Answer:

20

Step-by-step explanation:

Answer:

V(b) = 576 in³

Step-by-step explanation:

9 = 3 * 3

12 = 3 * 2 *2

To have 9 spheres in a box 12  x   12   in²

We need to arrange in a grid of  3 x 3 spheres of 4" diameter, then

three rows and three columns will fit exactly i the box  12 x 12 in²

Now the height of the box need to be adequate for the diameter of the spheres ( 4 in )

Therefore the total volume of the box is:

V(b) = 12*12*4  

V(b) = 576 in³

Answer:

(-1, 10)

(2, 1)

(0, 7)

Step-by-step explanation:

Any points, that makes the equation of the function, f(x) = 7 - 3x, true, is a point that lies on the graph of the function.

Let's check each of the options.

Option 1: (-2, 1).

Plug in x = -2, f(x) = 1 into f(x) = 7 - 3x

1 = 7 - 3(-2)

1 = 7 + 6

1 = 13 (this is not true)

Thus, (-2, 1) is not a point that lies on the graph of the function.

Option 2: (-1, 10).

Plug in x = -1, f(x) = 10 into f(x) = 7 - 3x

10 = 7 - 3(-1)

10 = 7 + 3

10 = 10 (this is true)

Thus, (-1, 10) is a point that lies on the graph of the function.

Option 3: (2, 1).

Plug in x = 2, f(x) = 1 into f(x) = 7 - 3x

1 = 7 - 3(2)

1 = 7 - 6

1 = 1 (this is true)

Thus, (2, 1) is a point that lies on the graph of the function.

Option 4: (0, 7).

Plug in x = 0, f(x) = 7 into f(x) = 7 - 3x

7 = 7 - 3(0)

7 = 7 - 0

7 = 7 (this is true)

Thus, (0, 7) is a point that lies on the graph of the function.

Option 5: (1, 5).

Plug in x = 1, f(x) = 5 into f(x) = 7 - 3x

5 = 7 - 3(1)

5 = 7 - 3

5 = 4 (this is not true)

Thus, (1, 5) is NOT a point that lies on the graph of the function.

Answer:

N = 76

Step-by-step explanation:

[tex]T = 50 + \frac{N - 40}{4}[/tex]

If T = 59,

[tex]59 = 50 + \frac{N - 40}{4}[/tex]

Simplify:

[tex]9 = \frac{N - 40}{4}[/tex]

[tex]36 = N - 40[/tex]

N = 76

I'm not entirely sure this is right, but I'm like 98% sure. (hopefully it's right!)

Answer:

x = k/6 - c/6 :)))))))))))))))))))