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liberstina [14]
3 years ago
7

The axis of symmetry for a quadratic equation can be found using the formula x =-b/2a , where a and b are coefficients in the qu

adratic equation and x represents the values along a vertical line on the coordinate plane. When the equation is solved for a, such that b is the numerator of the resulting fraction, what is the denominator of the fraction?

Mathematics
2 answers:
Eddi Din [679]3 years ago
6 0

Answer:

B

Step-by-step explanation:

a = -b/2x

djverab [1.8K]3 years ago
3 0

Answer:

2x

Step-by-step explanation:

Solve the equation for a as follows:

First multiply both sides by 2a:

(2a)x=-b and then divide both sides by 2x:

a=-\frac{b}{2x}

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Apple launches an ad campaign for iPhone 12. Managers want to know what is the % of social media mentions that have positive rea
Orlov [11]

Answer:

social media mentions do managers at Apple need to collect, if they want to get a margin of error of 2%

Sample size 'n' = 625

Step-by-step explanation:

<u><em>Step(i)</em></u>:-

Given data Apple launches an ad campaign for iPhone 12

Managers want to know what is the % of social media mentions that have positive reactions to the new ad campaign

probability of positive reactions p = 1/2

Probability of negative reactions q = 1-p = 1/2

we know that \sqrt{p(1-p}\leq \frac{1}{2}

<u><em>Step(ii):</em></u>-

Given margin of error  = 2 % =0.02

The margin of error is determined by

          M.E = \frac{\sqrt{p(1-p} }{\sqrt{n} }

         0.02 = \frac{\frac{1}{2}  }{\sqrt{n} }

        \sqrt{n} =\frac{1}{2 X0.02}

        √n = 25

squaring on both sides, we get

       n = 625

8 0
3 years ago
The amount of change that goes up. percent of amount?percent of change? percent of increase? percent of decrease?​
sweet [91]
the percentage increase
5 0
3 years ago
Need CORRECT answer ASSP
Misha Larkins [42]

Answer:

1. (4,5)

The average rate of change of f(x) remain constant (4). Over the interval (4,5), g(x)=5,2 exceeding the change of f(x).

2. None!! REMAIN CONSTANT AND INCREASE.

The rate of change of f(x) remain constant (4) and g(x) increases.

3. g(x) exceeds the value of f(x)

F(X)=31 < G(X)=35,7

4. EVENTUALLY.

5 0
3 years ago
A principal simulated a student raffle using 500 trials and recorded the grade level of the winner each time. The results are sh
AlexFokin [52]

Answer:

0.16

Step-by-step explanation:

Given the data:

Students __ `Gr_9 __Gr_10 __ G_11 __G_12

Frequency : 152 ___130 ______ 80 ___98

The probability is :

Frequency of grade 11 / number of trials

80 / 500

7 0
3 years ago
Which list contains ONLY rational numbers?
Debora [2.8K]
The answer is C.  1/7, 9, 2 Hoped this helped 
Feel free to ask anymore questions at branily.com 

3 0
3 years ago
Read 2 more answers
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