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3 years ago

Factor the following expression. 6x^2- 5x-1

Mathematics

1 answer:

jenyasd209 [6]3 years ago

8 0

Answer:

X=(6x+1)(x-1) because you are factoring out

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Find the equation of the line passing through the given points, (1,5) and (2, 7). Which

Kamila [148]

Slope formula (y2-y1)/(x2-x1)

(7-5)/(2-1) slope is 2

then plug in a coordinate point into the equation

y=2x+b

7=2(2)+b

b=3

therefore the equation is

y=2x+3

8 0

3 years ago

Middle school mathematics what is the answer as a ratio

Sergio [31]

Answer:

24 :28

Step-by-step explanation:

So you add up all the numbers and then you subtract what you are not wanting to get.

Hope that makes sense and helps!!:) Brainliest??

5 0

3 years ago

In a sample of 330 randomly selected PCC students it was found that 175 of them have a car. Assume this sample comes from a popu

Dvinal [7]

Answer:

a) $0.530 - 1.96\sqrt{\frac{0.530(1-0.530)}{330}}=0.47615$

$0.530 + 1.96\sqrt{\frac{0.530(1-0.530)}{330}}=0.58385$

And if we convert this interval into % we got (47.615%, 58.385%)

b) For this case since the lower value for the confidence interval is a value lower than 0.5 (50%) we don't have enough evidence to conclude at 10% of significance than most students at PCC own a car

Step-by-step explanation:

We can begin calculating the best estimator for the true proportion of students at PCC who own a car:

$\hat p = \frac{175}{330}=0.530$

Part a

The confidence level is 95% , and the significance level would be given by $\alpha=1-0.95=0.05$ and $\alpha/2 =0.025$ . And the critical values would be given by:

$z_{\alpha/2}=-1.96, z_{1-\alpha/2}=1.96$

The confidence interval for the true proportion is given by the following formula:

$\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$

Replacing the info given we got:

$0.530 - 1.96\sqrt{\frac{0.530(1-0.530)}{330}}=0.47615$

$0.530 + 1.96\sqrt{\frac{0.530(1-0.530)}{330}}=0.58385$

And if we convert this interval into % we got (47.615%, 58.385%)

Part b

For this case since the lower value for the confidence interval is a value lower than 0.5 (50%) we don't have enough evidence to conclude at 10% of significance than most students at PCC own a car

7 0

3 years ago

3x+13 what is x I need help please Need a quick response

Svetllana [295]

Answer:

X cannot be solved for

Step-by-step explanation:

This isn't an equation because there's no equal sign and it cannot be simplified further. X values cannot be combined with non-x values.

3 0

3 years ago

Scores on the ACT exam have a N(μ = 18,σ = 6) distribution, while scores on the SAT

elena-14-01-66 [18.8K]

Answer:

Emily has a higher relative score since her z-score is higher. This would mean she scored further above the mean than Xiaoyu.

Step-by-step explanation:

Find the z-scores by subtracting the score they got by the mean and then dividing by the standard deivation of their respective exams.

Xiaoyu:

z = $\frac{27 - 18}{6}$ = 1.5

Emily:

z = $\frac{720 - 500}{100}$ = 2.2

______

Emily has a higher relative score since her z-score is higher. This would mean she scored further above the mean than Xiaoyu.

3 0

3 years ago