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igomit [66]
3 years ago
14

What is the complete factorization of the polynomial below? x^3+ 5x^2- x-5

Mathematics
1 answer:
koban [17]3 years ago
7 0

Answer:

(x-1)(x+1)(x+5)

Step-by-step explanation:

x^3+5x^2 - x-5=

x^3-x+5x^2-5=

x(x^2-1) +5(x^2 - 1)=

(x^2- 1)(x+5)=(*)

(x-1)(x+1)(x+5)

(*) A^2 - B^2 =(A-B)(A +B)

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Find the value of y<br>possible answers are:<br>A. y=1.8<br>B. y=7.2<br>C. y=9<br>D. y=16.2
Dahasolnce [82]

Answer:

I believe the answer is C.

Step-by-step explanation:

I put in 9 into the y

6(9)= 54

4(9)+18=

36+18= 54

Add them with the right angles (which are 90)

Leaves the other angles KLH, FLH being 36

7 0
3 years ago
Melanie and Michael are on the north bank of a river that is flowing east to west at a speed of 0.5 m/s. They paddle their surf
IRINA_888 [86]

Answer:

total distance travel by them to cross river is 17.3 m

Step-by-step explanation:

Assume A be the initial position of both person and B as apposite point to A

u  component of velocity along SOUTH DIRECTION is 4 cos30 = 0.4330 m/s

v  component of velocity along SOUTH DIRECTION is 4 cos90 = 0 m/s

total speed will be = 0.4330 + 0  = 0.4330 m/s

time taken= \frac{width/ of/ river}{speed}

time taken = \frac{30}{0.4330} = 69.3 sec

component of u in downstream direction = 4 cos120 = -0.25 m/s

component of v in downstream direction = 4 cos 0 = 0.5 m/s

total component in downstream will be -0.25 + 0.5 = 0.25

total distance travel by them to cross river is = 0.25\times 69.3 = 17.3 mdownstream.

5 0
4 years ago
Kirk used 10.2 centimeters of tape to wrap 3 presents. How many presents did Kirk wrap if he used 23.8 centimeters of tape?
insens350 [35]

Answer:

Kirk wrapped 7 presents with those 23.8 cm of tape.

Step-by-step explanation:

Figure out the unit rate:

10.2 cm tape

-------------------

  3 presents

or

   3 presents

-----------------------

  10.2 cm tape

Multiplying this by 23.8 cm results in the number of presents Kirk wrapped with that much tape:

(3 presents)(23.8 cm tape

--------------------------------------- = 7 presents

           10.2 cm tape

Kirk wrapped 7 presents with those 23.8 cm of tape.

7 0
4 years ago
Twelve students tried out for the cheerleading squad. Four students were selected. What is the ratio of students selected to tho
Basile [38]

Answer:

B

1:3

Step-by-step explanation:

4:12

simplify

divide both by 4

1:3

6 0
3 years ago
The sum of twice a number and 17 is -1
dimulka [17.4K]
Let call the number we are searching for x. 2*x + 17 = -1 so 2*x = -1-17 = -18 and x = -18/2 = -9
6 0
4 years ago
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