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4 years ago

Are the graphs of the lines in the pair parallel? Explain.

1 answer:

5 0

The slope of the line given its equation can be calculated by,

m = -A/B

where m is the slope, A and B are the numerical coefficients of x and y terms, respectively.

Substituting the known values,

m = -3/-1 = 3

Thus, the slope of the line is 3. The answer is letter D.

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Rearrange the quadratic equation so that it is equal to 0. Then factor the equation

goldenfox [79]

We need an equation for this, theres no 'formula' for doing this (ignoring the quadratic formula, as that is a long-winded way of factorising a quadratic equation)

5 0

3 years ago

What is the solution to the system x+y=10 3y=-3x+30 PLEASE helpppp

choli [55]

Answer:

Step-by-step explanation:

x+y=10

x=10-y

x=10-5

x=5

3y= -3x+30

3(10-y)= -3(10-y)+30

30-3y= -30+3y+30

30+30-30=6y

30=6y

y=5

6 0

4 years ago

A survey of 865 voters in one state reveals that 408 favor approval of an issue before the legislature. Construct the 95% confid

katrin [286]

Answer:

The 95% confidence interval for the true proportion of all voters in the state who favor approval is (0.4384, 0.5050).

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 $1 - \frac{\alpha}{2}$ .

For this problem, we have that:

$n = 865, \pi = \frac{408}{865} = 0.4717$

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 $Z = 1.96$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.4717 - 1.96\sqrt{\frac{0.4717*0.5283}{865}} = 0.4384$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.4717 + 1.96\sqrt{\frac{0.4717*0.5283}{865}} = 0.5050$

The 95% confidence interval for the true proportion of all voters in the state who favor approval is (0.4384, 0.5050).

6 0

3 years ago

What’s 0.005 recurring as a fraction

PilotLPTM [1.2K]

Answer:

0.005 = 5/1000 = 1/200

Hope it helps

3 0

3 years ago

How do you solve ?? 5x^4( 6x^4-3x^2 +7)

melamori03 [73]

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3 0

3 years ago