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3 years ago

Y= -4/3x - 5/2y-intercept:slope:

Mathematics

1 answer:

CaHeK987 [17]3 years ago

3 0

Answer:the answer is Y= -4/3x - 5/2

Step-by-step explanation:

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3) Solve these problems that have more than one answer.

MaRussiya [10]

Answer:

225

Step-by-step explanation:

Mary = 3x (3 times Carey)

Carey = x

Barry = x/2 (Because Carey read twice as many as Barry, it means he read half the amount Carey did)

3x + x + x/2 = 405

4x + x/2 = 405

8x/2 + x/2 (treat these as fractions) = 405

9x/2 = 405

9x = 810 (cross multiply)

x = 90

Mary = 3(90) 270

Carey = 90

Barry = 90/2 45

Mary - Barry

270 - 45 = 225

Hope this helps! :)

5 0

3 years ago

Read 2 more answers

for the data values below construct a 95 confidence interval if the sample mean is known to be 12898 and the standard deviation

Volgvan

Answer:

A 95% confidence interval for the population mean is [3315.13, 22480.87] .

Step-by-step explanation:

We are given that for quality control purposes, we collect a sample of 200 items and find 24 defective items.

Firstly, the pivotal quantity for finding the confidence interval for the population mean is given by;

P.Q. = $\frac{\bar X-\mu}{\frac{s}{\sqrt{n} } }$ ~ $t_n_-_1$

where, $\bar X$ = sample proportion of defective items = 12,898

s = sample standard deviation = 7,719

n = sample size = 5

$\mu$ = population mean

<em> Here for constructing a 95% confidence interval we have used a One-sample t-test statistics as we don't know about population standard deviation. </em>

<u>So, 95% confidence interval for the population mean, </u> $\mu$ <u> is ; </u>

P(-2.776 < $t_4$ < 2.776) = 0.95 {As the critical value of t at 4 degrees of

freedom are -2.776 & 2.776 with P = 2.5%}

P(-2.776 < $\frac{\bar X-\mu}{\frac{s}{\sqrt{n} } }$ < 2.776) = 0.95

P( $-2.776 \times {\frac{s}{\sqrt{n} } }$ < ${\bar X-\mu}$ < $2.776 \times {\frac{s}{\sqrt{n} } }$ ) = 0.95

P( $\bar X-2.776 \times {\frac{s}{\sqrt{n} } }$ < $\mu$ < $\bar X+2.776 \times {\frac{s}{\sqrt{n} } }$ ) = 0.95

<u>95% confidence interval for</u> $\mu$ = [ $\bar X-2.776 \times {\frac{s}{\sqrt{n} } }$ , $\bar X+2.776 \times {\frac{s}{\sqrt{n} } }$ ]

= [ $12,898-2.776 \times {\frac{7,719}{\sqrt{5} } }$ , $12,898+2.776 \times {\frac{7,719}{\sqrt{5} } }$ ]

= [3315.13, 22480.87]

Therefore, a 95% confidence interval for the population mean is [3315.13, 22480.87] .

5 0

4 years ago

Are the two triangles below congruent? explain how you know

Ahat [919]

I would say yes just by observing them for a few minutes

4 0

3 years ago

1 2 2 4 3 9 4 16 what is the range of the function please help

Ivahew [28]

Answer:

<h2 />

Step-by-step explanation:

x y

1 2

2 4

3 9

4 16

This sounds like a quadratic equation of f(x)=x^2, thus, the range is:

<h3>R(x): (-∞,+∞)</h3><h3 /><h3>If the function only has these points, then the range is:</h3><h3>R(x): [2]∪[4]∪[9]∪[16]</h3>

3 0

3 years ago

Help me please and thank you:)

harkovskaia [24]

1.2
The square root of 1.44 is 1.2

6 0

3 years ago

Y= -4/3x - 5/2y-intercept:slope:​

Y= -4/3x - 5/2y-intercept:slope: