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Zinaida [17]
3 years ago
7

Help please ;-; find the scale factor

Mathematics
1 answer:
Stels [109]3 years ago
4 0

Answer:

3/5

Step-by-step explanation:

BC÷EF

6÷10=3/5

AC÷DF

9÷15=3/5

AB÷DE

12÷20=3/5

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Describe the steps you would use to factor 2x3 + 5x2 – 8x – 20 completely. Then state the factored form.
WARRIOR [948]
The polynomial 2x^3 + 5x^2-8x-20 may have solutions which are the divisors of -20, therefore -20 has the following divisors: \pm 1, \pm 2, \pm 4, \pm 5, \pm 10, \pm 20.
If x=1, then 2\cdot1^3 + 5\cdot1^2-8\cdot1-20=-20\neq 0,
if x=-1, then 2\cdot(-1)^3 + 5\cdot(-1)^2-8\cdot(-1)-20=-9\neq 0,
if x=2, then 2\cdot2^3 + 5\cdot2^2-8\cdot2-20=0, then x=2 is a solution and you have the first factor (x-2). 
If x=-2, then 2\cdot(-2)^3 + 5\cdot(-2)^2-8\cdot(-2)-20=0, then x=-2 is a solution, so you have the second factor (x+2).
Since x-2 and x+2 are two factors of 2x^3 + 5x^2-8x-20 , then the polynomial x^2-4 is a divisor of 2x^3 + 5x^2-8x-20 and dividing the polynomial 2x^3 + 5x^2-8x-20 by x^2-4 you obtain 
 2x^3 + 5x^2-8x-20=(x-2)(x+2)(2x+5).











5 0
3 years ago
Read 2 more answers
A company that makes​ hair-care products had 3,000 people try a new shampoo. Of the ​3,000 people, 6 had a mild allergic reactio
sergeinik [125]

Answer:

0.2%

Step-by-step explanation:

6                x

------   =   ----------

3000         100

8 0
3 years ago
Read 2 more answers
In a right triangle, the value of cos B = 3/5. What is the value of sin B?
ozzi

Answer:

4/5

Step-by-step explanation:

cos B = 3/5

cos Ф = adjacent/hypothesis

hypothesis ² = adjacent² + opposite²

5²= 3²+ o²

25 = 9+o²

25-9=o²

16 = o²

√16 = o = 4

Sin B = opposite/hypothesis = 4/5

7 0
4 years ago
Evaluate AB for A = 5, B =-2, C = 4 and D = -6.<br> 5/12<br> -5/12<br> -3/2<br> 3/2
Nezavi [6.7K]

Answer:

AB = -10

Im confused is this what you wanted?

5 0
3 years ago
What is this equation factored<br> 3x^2+7x-8=0
Vesna [10]

Answer:

−

7

−

√

145

6

,

−

7

+

√

145

6

Step-by-step explanation:

7 0
3 years ago
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