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Lina20 [59]
2 years ago
12

Find x. -2(6+x)=18-3x

Mathematics
1 answer:
Alja [10]2 years ago
3 0

Answer:

x=30

Step-by-step explanation:

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). If a, ß are zeroes of the quadratic polynomial p(x)=kx²+4x+4 such
natta225 [31]

Answer:

The values of k are 2/3 and -1

Step-by-step explanation:

Product of zeros = αβ= constant  / coefficient of x^2 =  4/k

Sum of zeros =α+β = - coefficient of x / coefficient of x^2= -4/k

Given

Consider a= α and b= β

(\alpha)^2 + (\beta)^2 = 24

(\alpha)^2 + (\beta)^2 can be written as (\alpha)^2 + 2(\alpha)(\beta) + (\beta)^2 if we add \pm 2 (\alpha)(\beta) in the above equation.

(\alpha)^2 + 2(\alpha)(\beta) + (\beta)^2 -2(\alpha)(\beta)

(\alpha + \beta)^2 -2(\alpha)(\beta)

Putting values of αβ and α+β

(\frac {-4}{k})^2 -2( \frac {4}{k}) = 24\\\frac {16}{k^2} - \frac {8}{k} = 24\\Multiplying\,\, the \,\, equation\,\, with\,\, 8K^2\\ 2 - k= 3K^2\\3k^2-2+k=0\\or\\3k^2+k-2=0\\3k^2+3k-2k-2=0\\3k(k+1)-2(k+1)=0\\(3k-2)(k+1)=0\\3k-2=0 \,\,and\,\, k+1 =0\\k= 2/3 \,\,and\,\, k=-1

The values of k are 2/3 and -1

8 0
3 years ago
1. Solve x + 10 = 19
Nataly_w [17]

Answer:

x=9

Step-by-step explanation:

9+10=19

solved.........

4 0
3 years ago
Read 2 more answers
If y= x+9 <br>______<br>3-x<br>find the value of y when x=5​
Artemon [7]

Answer:

-28

Step-by-step explanation:

y/3-x = x+9

x=5

=>y/3-5=5+9

=>y/-2=14

=>y = - 28

8 0
3 years ago
Solve for x<br> need help asap pls <br> will give brainliest
Basile [38]

Step-by-step explanation:

tangent forms a right angle with radius of circle

so (6.8+10.2)^2 = 10.2^2 + x^2

x= 13.6

7 0
2 years ago
The average length of a female white-beaked dolphin is about 111 inches. What is this length in feet and inches?
Tpy6a [65]
1. there are 9 1/4 feet

2. there are 16 ounces in a pound
    16×8=128 ounces
      Max weighs 128 ounces

hope this helped
7 0
3 years ago
Read 2 more answers
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