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11Alexandr11 [23.1K]

2 years ago

13

I only need someone to put it in the quadratic formula I already have solutions. Please answer ASAP!!! I will give brainliest!!!

1 answer:

KengaRu [80]2 years ago

7 0

The quadratic formula is $\frac{-b+-\sqrt[2]{b^2-4ac}}{2a}$

and in the equation ax^2+bx+c=0

so now all you have to do is substitute the numbers into the quadratic formula

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Can someone pleaseeee help if you’re correct I’ll give u brainlist

tangare [24]

55 degrees. If you add the other three angles together you get 305. Considering that a circle is 360 degrees, you would subtract those two and get 55.

4 0

2 years ago

7 is 5% of what number

Salsk061 [2.6K]

Answer:

the answer is 140 , please let me know if I am wrong.

8 0

2 years ago

Read 2 more answers

350/100 as a decimal and a percentage

Step2247 [10]

Decimal: 3.5 350 divided by 100 = 3.5 Percentage: 350% Move the decimal 2 times to the right 3.5 -> 350 Add a percent sign

3 0

2 years ago

7.1.35-T Question Help You are the operations manager for an airline and you are considering a higher fare level for passengers

shusha [124]

Answer:

You must survey 784 air passengers.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

Assume that nothing is known about the percentage of passengers who prefer aisle seats.

This means that $\pi = 0.5$ , which is when the largest sample size will be needed.

Within 3.5 percentage points of the true population percentage.

We have to find n for which M = 0.035. So

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.035 = 1.96\sqrt{\frac{0.5*0.5}{n}}$

$0.035\sqrt{n} = 1.96*0.5$

$\sqrt{n} = \frac{1.96*0.5}{0.035}$

$(\sqrt{n})^2 = (\frac{1.96*0.5}{0.035})^2$

$n = 784$

You must survey 784 air passengers.

6 0

2 years ago

I broke my laptop sorry about the spots

Sergeu [11.5K]

Answer: $3x^2-x+3$

Step-by-step explanation:

$(4x^2-x+6)-(x^2+3)$

Distribute the negative sign. This basically changes all the signs inside the parentheses.

$4x^2-x+6-x^2-3$

Combine like terms;

$3x^2-x+3$

7 0

2 years ago