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Lady bird [3.3K]
3 years ago
14

1. Which of the following equations is equivalent to 2(a + 6) - 3(a - 5) = 18

Mathematics
1 answer:
ozzi3 years ago
8 0

Answer:

-a +27=28

Step-by-step explanation:

2a+12-3a+15=18

-a+27=18

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Please help I will mark brainliest!!!!!!!!!!
Oxana [17]

Answer:

9/10 pounds

Step-by-step explanation:

3/5 × 1 1/2

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What is the circumference of a circle with the radius of 5 cm use 3.14 for pi​
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Answer:

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Step-by-step explanation:

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2 years ago
. If α and β are the roots of
Lostsunrise [7]

Answer:

18x^2+85x+18 = 0

Step-by-step explanation:

<u><em>Given Equation is </em></u>

=> 2x^2+7x-9=0

Comparing it with ax^2+bx+c = 0, we get

=> a = 2, b = 7 and c = -9

So,

Sum of roots = α+β = -\frac{b}{a}

α+β = -7/2

Product of roots = αβ = c/a

αβ = -9/2

<em>Now, Finding the equation whose roots are:</em>

α/β ,β/α

Sum of Roots = \frac{\alpha }{\beta } + \frac{\beta }{\alpha }

Sum of Roots = \frac{\alpha^2+\beta^2  }{\alpha \beta }

Sum of Roots = \frac{(\alpha+\beta )^2-2\alpha\beta   }{\alpha\beta  }

Sum of roots = (\frac{-7}{2} )^2-2(\frac{-9}{2} ) / \frac{-9}{2}

Sum of roots = \frac{49}{4} + 9 /\frac{-9}{2}

Sum of Roots = \frac{49+36}{4} / \frac{-9}{2}

Sum of roots = \frac{85}{4} * \frac{2}{-9}

Sum of roots = S = -\frac{85}{18}

Product of Roots = \frac{\alpha }{\beta } \frac{\beta }{\alpha }

Product of Roots = P = 1

<u><em>The Quadratic Equation is:</em></u>

=> x^2-Sx+P = 0

=> x^2 - (-\frac{85}{18} )x+1 = 0

=> x^2 + \frac{85}{18}x + 1 = 0

=> 18x^2+85x+18 = 0

This is the required quadratic equation.

5 0
3 years ago
Read 2 more answers
What is the LCM(Least common multiple) of 8 and 100
Sliva [168]
The LCM is 2, Because 2*4=8 and 2*50=100 :)
8 0
3 years ago
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ANSWER ASAP-right answer gets brainlist<br> What is the measure of QS?
jarptica [38.1K]

The angle that subtends a chord is half the measure of the arc, so we have an arc QS of 2(84)=168 degrees.

Answer: 168 degrees

7 0
3 years ago
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