How do u multiply x^2-4 over x^2-1 times x+1 over x^2+2x

Answers

Answer 1
Answer: (x ^ 2-4 )/(x ^ 2-1)*( x + 1 )/(x ^ 2 +2 x)=(x ^ 2-2^2 )/(x ^ 2-1)*( x + 1 )/(x(x +2 )) =\n \n \n =((x -2)\not(x+2)^1 )/((x -1)\not(x+1)^1)*( \not(x + 1)^1 )/(x\not(x +2)^1 )= ( x-2 )/(x(x-1)) \n \n \n \na^2-b^2 =(a-b)(a+b)


Answer 2
Answer: (X2-4)/(x2-1).  *  (x+1)/(x2+2x)
[(x-2)(x+2)]/[(x-1)(x+1)]. * (x+1)[x(x+2)]
(x-2)/(x-1) * 1/x
(x-2)/(x2-x)

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A spinner has five sections, labeled A, B, C, D, and E. The spinner is spun 84 times, and the results are recorded in the table.What is the experimental probability of the spinner’s landing on A? Round to the nearest percent, if necessary.

Outcome A B C D E
Number of trials 14 20 18 15 17

A.22%

B.20%

C.17%

D.14%.

Answers

The experimental probability is C. 17%.

17% is derived from the following solution.

14/84 = 0.1666
0.1666 * 100% = 16.66% or 17%

This is based on the result of the experiment conducted.

The theoretical probability of A is 20%. 

1/5 = 0.20
0.20 x 100% = 20%

A is only one event out of 5 letters.

Answer:

C.17 percent

Step-by-step explanation:

Shirley received $10 for her allowance. I went to the store to buy journaling supplies. She bought a pen for $1.58 and a notebook for $3.75. How much change did she get from her $10 bill

Answers

Answer:

4.67

Step-by-step explanation:

2x-17x+15=0 solve for x

Answers

Answer:

x=1

Step-by-step explanation:

2x-17x+15=0

Combine like terms

-15x +15 = 0

Add 15x to each side

-15x+15x+15=0+15x

15 = 15x

Divide by 15

15/15 = 15x/15

1 =x

Answer:

x=1

Step-by-step explanation:

x=1 because you need to isolate the variable by dividing each side factors that don't have a variable.

Lourdes is listening to an audio book that is 9 hours long. She has listened for 6 1/6 hours so far. How many hours of listening time are left.

Answers

9 - 6 1/6 = 
= 2 5/6 hours = 2 hours 50 minutes
Answer:
2 5/6 hours of listening time are left.
Thank you. 

What is the surface area of a sphere with the given dimension? Express your answer to nearest hundredth. Use 3.14 for pi.Radius = 5cm.
a. 982 sq. cm
C. 314 sq.cm
b. 1481.34 sq.cm
d. 628 sq. cm

Answers

Answer:

314cm²

Step-by-step explanation:

Surface area(sphere) =4πr²

4 * 3.14 * (5²)

4 * 3.14 * 25

Hence, Surface area is 314sq.cm

The best answer is C 314 sq.cm because that is the use of pi

There are 9 computers and 72 students. what is the unit rate of students to computers?

Answers

The unit rate in students per computer is 8.

What is unit rate?

There is independent quantity, and a quantity which depends on it (dependent quantity). When independent quantity moves by a unit measurement (single unit increment), the increment in dependent quantity is called rate of increment of dependent quantity per unit increment in independent quantity.

We are Given that there are 9 computers and 72 students.

We need to find the unit rate of students to computers.

Number of bolts in 9 computers = 72

Number of bolts in 1 computers = 72/9

                                                    = 8

So, it will be 8

Thus, the unit rate is 8 students per computer.

Learn more about rate on:

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Answer:

The answer is 8

Step-by-step explanation:

72 divided by 9 = 8