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zhannawk [14.2K]
3 years ago
10

Solve for the zeros of the quadratic function f(x) = 9x² + 6x + 1.

Mathematics
1 answer:
Nezavi [6.7K]3 years ago
8 0

Answer:

\large\boxed{x=-\dfrac{1}{3}}

Step-by-step explanation:

f(x)=9x^2+6x+1\\\\\text{The zeros are for}\ f(x)=0\\\\9x^2+6x+1=0\\\\9x^2+3x+3x+1=0\\\\3x(3x+1)+1(3x+1)=0\\\\(3x+1)(3x+1)=0\\\\(3x+1)^2=0\iff3x+1=0\qquad\text{subtract 1 from both sides}\\\\3x=-1\qquad\text{divide both sides by 3}\\\\x=-\dfrac{1}{3}

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Answer:

Our score = 0.60, Amanda's score = 0.25

Step-by-step explanation:

For Amanda

μ = 15 , σ = 4

z- score for X = 16 is (From z table)

z = (X - μ)/σ = (16 - 15)/4 = 0.25

For us

μ = 310 , σ = 25

z score for X = 325 (From z table)

z = (325-310)/25 = 0.60

Since our z score is better than Amanda's z score, we can say we did better

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ElenaW [278]

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Step-by-step explanation:

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3 years ago
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sergiy2304 [10]

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3 years ago
You are asked to choose a vowel (a, e, i, o, u) from a list, and then to choose either the number 6 or 7. How many possible outc
faltersainse [42]

Answer:

10 possible outcomes

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Step-by-step explanation:

As there are 5 vowels and 2 numbers that have to be chosen, the total outcomes are

= 5x2 = 10

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Answer:

Step-by-step explanation:

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=====================

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n = 12

8 0
3 years ago
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