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3 years ago

When 9 is added to five times a number, we get 19. The number is

Mathematics

2 answers:

Aneli [31]3 years ago

8 0

It is number to your welcome man

son4ous [18]3 years ago

4 0

Answer:

the number is 2

Step-by-step explanation:

5x2=10+9=19

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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

3 years ago

34. The distance a spring will stretch varies directly with how much weight is attached to the spring. If a spring stretches 8 i

sasho [114]

The answer is 4.9 inches

3 0

3 years ago

6) three times a number increased by four is less than -62

Irina-Kira [14]

6) 3x + 4 < - 62 x = - 23 ⇒ 3(-23) + 4 < - 62
 - 4 - 4 -69 + 4 < - 62
3x < -66 - 65 < - 62
÷ 3 ÷3
x < -22

7) x/-5 + 1 < 7 x = -30 ⇒ -30/-5 + 1 < 7
 - 1 -1 6 + 1 < 7
x/-5 < 6 7 < 7
 × -5 × -5
x < -30

8) x/3 - 2 > -12 x = -30 ⇒ -30/3 - 2 > -12
x/3 > -10 -10 - 2 > -12
* 3 *3 -12 > -12
x > -30

9) -2x - 6 > -18 x = 5 ⇒ -2(5) - 6 > -18
 +6 +6 -10 - 6 > -18
-2x > -12 -16 > -18
 ÷ -2 ÷ -2
x > 6 ⇒ x < 6
*flip the inequality sign because the divisor is a negative number: This is to make the inequality true.

6 0

3 years ago

I need helpp will give brainliest!!!! Plzz answer both Part A and B!!!

ohaa [14]

Part a is D
Part b is D

8 0

4 years ago

Read 2 more answers

Can some help with the answer please it’s very much needed and apprIeciated

Mumz [18]

Answer:

Step-by-step explanation: