A little confused here!

Hey guys. I just need someone's help to clarify things with me.

As I was doing the equations, I got to:

x^-1
-----
x^13

I moved the x^-1 down to x^13 so they'd subtract. But when I did, x^-1 became positive.

So it became x^13 times x^1

Radical Rule: a^n x a^m is pretty much a^n+m

So my answer was 14.

How did x^-1 become positive in this case?

The distance traveled by the echo is used to determine the player's distance from the wall

The player's distance from the wall is 66 m.

Reason:

Known parameter;

The time after which the tennis player hears the echo of the ball, t = 0.4 s

The speed of sound in air, v = 330 m/s

The distance of the player from the wall = Required

Solution:

Let d, represent the distance of the player from the wall

An echo is the reflection the wave of the sound of hitting the ball that

travels to the wall and back

The distance traveled by the sound to the wall, d, and back, (d again), is 2·d

[tex]Speed = \dfrac{Distance}{Time}[/tex]

Therefore;

Therefore;

[tex]330 = \dfrac{2 \cdot d}{0.4}[/tex]

330 × 0.4 = 2·d

[tex]d = \dfrac{330 \times 0.4}{2} = 66[/tex]

Learn more here:

https://brainly.com/question/14754705

Answer:

B. x=4

Step-by-step explanation:

Answer: 1/2

Step-by-step explanation:

55 is close to 50

99 is close to 100

55/99 is close to 50/100 = 1/2

Using a calculator, 55/99 = 0.556 approximately which rounds to 0.5 = 1/2

Answer:

1/2

Step-by-step explanation:

55/99 = 0.555

0 = 0

1/2 = 0.5

1  = 1

1 1/2 = 1.5

Hopefully this helps!

Brainliest please?

Answer:

Algebra =

X/4 = -5/20

Simplify :

X/4 = -1/4

Of course, Will same x/4 = -1/4

x = -1

Step-by-step explanation:

[tex]\begin{aligned}\tt\frac{x}{4}&=\tt\frac{-5}{20}\\\tt 20x&=\tt -5\times 4\\\tt 20x&=\tt -20\\\tt x&=\tt -1\end{aligned}[/tex]

Answer:

the 5 gallon

67.45 ÷ 5= $13.49

Answer:

sorry

Step-by-step explanation:

sorry

Answer:

Step-by-step explanation:

This is a translation up and right.

Compare the coordinates of corresponding points:

The difference of coordinates:

The rule:

Answer:

10 liters of 40% solution

10 liters of 10% solution

Answer:

Step-by-step explanation:

54/5=10 4/5

Answer:

Square root =

remember :

[tex]\boxed {x^2 = \pm a}[/tex]

x² = ± a

x = ña

.

x = ñ25

x = ±5

• x = 5 and -5

Answer:

1200

Step-by-step explanation:

Answer:

pop music of 90

Answer:

First box is 7x + 21, because when you distribute, you are multiplying the term on the outside of the paranthesis with the term(s) on the inside of the paranthesis.

Second box is 21 + 7x, because the communitive property is basically the same except the terms may be flipped. (Nothing else is different, all terms and signs stay the same, and has the same product/answer.)

Step-by-step explanation:

Hope this makes sense.

Please tell me if I'm wrong :)

Answer:

wrong you for the points you bozzo

Answer:

the last one is

four cubed plus 8 to the 4th power

4^3 + 8^4

4160

Step-by-step explanation:

Answer:

I think its A

Step-by-step explanation:

the answer is 33 because 3+3=6*10-35+2

Answer:

[tex]54[/tex]

Step-by-step explanation:

[tex] a_1 {r}^{n - 1} \\ 2 \times {3}^{4 - 1} \\ 2 \times {3}^{3} \\ 2 \times 3 \times 3 \times 3 \\ 2 \times 9 \times 3 \\ 18 \times 3 \\ = 54[/tex]

Hope this helps you.

Let me know if you have any other questions :-):-)

Answer:

Mean: 30 mL

Standard Deviation: 45mL

Step-by-step explanation:

Answer:

The image is blocked

Step-by-step explanation:

Answer:

it should be p=14,x=16,12

The roots of the equations are 2 and 6.

The equation of the form ax² + bx +c is known as a quadratic equation.

Given that, the quadratic equation is x² - (4 + p)x + 12= 0.

Let the roots of the quadratic equation be a and b.

If the coefficient of x² is 1 in a quadratic equation, then the coefficient of x is equal to the sum of the roots and the constant term is equal to the product of the roots.

Therefore,

a + b = -(4 + p)    (1)

ab = 12                (2)

Given that, one root is three times the other, so, let a = 3b and substitute it into equation (2)

3b(b) = 12

3b² = 12

b² = 4

b = 2

Therefore, the value of a is:

a= 3(2)

a = 6

Hence, the roots of the equations are 2 and 6.

Learn more about the quadratic equations:

https://brainly.com/question/17177510

#SPJ2

Answer:

-24

Step-by-step explanation:

10-s=34

collect like terms

10-34=s

s=-24

Answer:

You also have to pay attention to the signs when you multiply and divide. There are two simple rules to remember: When you multiply a negative number by a positive number then the product is always negative. When you multiply two negative numbers or two positive numbers then the product is always positive.

Step-by-step explanation:

Answer:

look at the explanation 20,440

Step-by-step explanation:

so the invested 2,800 $  and the interest rate is 1.46 so first what I would do is 1.46 times 5 = 7.3 then 7.3 x 2,800 =20,440

so I think the answer is 20,440

not sure if this is correct but I gave it my all

or you could just do 2800 time 5 time 1.46

Answer:

4.140393356

Step-by-step explanation:

Mean = (3+4+5+7+10+12+15) / 7 = 8

Count = 7 numbers

Sum of the numbers = 56

Each number minus the mean =

(3-8=-5)(4-8=-4)(5-8=-3)(7-8=-1)(10-8=2)(12-8=4)(15-8=7)

Now square of each of these numbers:

25+16+9+1+4+16+49 = 120

Variance = 120/7 = 17.14285714

Standard deviation = square root of the variance

Sqrt 17.14285714 = 4.140393356

74  R28

So sorry if its incorrect!

Answer:

240

Step-by-step explanation:

Answer:

1,219,958

Step-by-step explanation: You add 2+6=8 + 10+3=13 + 19+3=22 + 26+5=31 + 31+1=32 + 5+7=13, add them all and its equal to 1,219,958.