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2 years ago

What is the value of r?

Mathematics

1 answer:

finlep [7]2 years ago

3 0

Answer:

A.12

Step-by-step explanation:

2×r-13 = 11

r + 2 = 14

11 + 14 = 25

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Help please, Lol. TvT

zysi [14]

Answer:

-513.22

Step-by-step explanation:

I don't think they earned any profit. but instead lost money. Sorry it was wrong at first, I misread something.

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2 years ago

Find all complex solutions of 7x^2-7x+3=0

Sedaia [141]

Answer:

The complex solutions are

$x = (\frac{7-\sqrt{35} i }{42} , ) x = \frac{7 + \sqrt{35} i }{42})$

Step-by-step explanation:

Step(i):-

Given equation 7 x² - 7 x +3=0

$x = (\frac{-b -\sqrt{b^{2}-4ac } }{2ac} , \frac{-b +\sqrt{b^{2}-4ac } }{2ac})$

Given standard equation

a x² +b x +c =0

a = 7 , b= -7 and c=3

Step(ii):-

$x = (\frac{-(-7) -\sqrt{(-7)^{2}-4(7)(3) } }{2(7)(3)} , \frac{-(-7) +\sqrt{(-7)^{2}-4(7)(3) } }{2(7)(3)})$

$x = (\frac{7-\sqrt{(49-84 } }{42} , \frac{7 +\sqrt{(49-84 } }{42})$

$x = (\frac{7-\sqrt{35i^{2} } }{42} , \frac{7 + \sqrt{35i^{2} } }{42})$

$x = (\frac{7-\sqrt{35} i }{42} , \frac{7 + \sqrt{35} i }{42})$

8 0

2 years ago

Your class is planning a trip to Science East . The school will have to pay $250 for the bus and $3per student.Write an equation

Lisa [10]

Answer: 250+3x

Step-by-step explanation: 250 for the bus and the students is $3 each so the students could be x.

3 0

2 years ago

solve. 1/3/4+ 7/8 A. 2/1/4 B. 2/5/8 C. 2/3/8 D. 3/1/2

sleet_krkn [62]

Answer:

god is the answer to everything

Step-by-step explanation:

god

5 0

2 years ago

3/4 x 5/6 plssssssssssss help

yan [13]

the answer is 5/8 :)

3 0

2 years ago

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