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NISA [10]
2 years ago
14

Solve the equation 9x2 + 8x - 5= 3x² to the nearest tenth

Mathematics
1 answer:
MArishka [77]2 years ago
5 0

Answer:

x=13

Step-by-step explanation:

9*2+8x-5=3x^2

9*2 = 18

18-5=13

13+8x=3x^2

3x^2 = 9x

13+8x=9x

   -8x -9x

13=x

x=13

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Answer:

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Step-by-step explanation:

Sphere A has a radius of 24 centimeters, and sphere B has a diameter of 42 centimeters.

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2 years ago
Given the function LaTeX: f\left(x\right)=-5x^2-x+20f ( x ) = − 5 x 2 − x + 20, find LaTeX: f\left(2\right)f ( 2 ). Group of ans
BartSMP [9]

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Step-by-step explanation:

The form of the quadratic function is;

f(x) = ax² + bx + c, where

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  • b is the coefficient of x
  • c is the numerical term
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∵ f(x) = -5x² - x + 20

- f(2) means value f(x) at x = 2

∵ x = 2

- Substitute x in the function by 2 to find f(2)

∵ f(2) = -5(2)² - (2) + 20

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∴ f(2) = -20 - 2 + 20

∴ f(2) = -2

The value of f(2) is -2

Learn more:

You can learn more about the function in brainly.com/question/12363217

#LearnwithBrainly

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