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3 years ago

Solve the following equation when x=2 and y=4 3x+2y+4=

Mathematics

2 answers:

blagie [28]3 years ago

4 0

Answer:

Step-by-step explanation:

plug in

ICE Princess25 [194]3 years ago

3 0

Answer:

=2y+10

Step-by-step explanation:

You just have to plug them into the equation which turns it into 3(2)+2y+4)= then simplify it which is

(3)(2)+2y+4

=6+2y+4

then combine like terms

=6+2y+4

=(2y)+(6+4)

=2y+10

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What is the equation of a line, in Slope Intercept Form, with a slope of 4 and passes through the point (1, 6)?

Butoxors [25]

The slope-intercept form:

$y=mx+b$

m - slope

b - y-intercept

We have the slope m = 4 → $y=4x+b$

and point (1, 6). Substitute:

$6=4(1)+b$

$6=4+b$ subtract 4 from both sides

$2=b\to b=2$

<h3>Answer: y = 4x + 2</h3>

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3 years ago

Find the area of the shaded region. Round your answer to the nearest hundredth.

valina [46]

Answer:

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2 years ago

Read 2 more answers

Which expression is equivalent to (5^-2)(5^-1) A. -1/125 B. -1/5 C. 1/125 D. 1/5

n200080 [17]

Answer:

1/125

Step-by-step explanation:

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3 years ago

A confidence interval was used to estimate the proportion of statistics students that are female. A random sample of 72 statisti

jeyben [28]

Answer:

We need a sample of size at least 13.

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:

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

90% confidence interval: (0.438, 0.642).

The proportion estimate is the halfway point of these two bounds. So

$\pi = \frac{0.438 + 0.642}{2} = 0.54$

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 $Z = 1.96$ .

Using the information above, what size sample would be necessary if we wanted to estimate the true proportion to within ±0.08 using 95% confidence?

We need a sample of size at least n.

n is found when M = 0.08. So

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

$0.08 = 1.96\sqrt{\frac{0.54*0.46}{n}}$