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3 years ago

30 POINTS! PLEASE HELP

Mathematics

2 answers:

Kryger [21]3 years ago

8 0

Answer:

y = -4x+4

Step-by-step explanation:

Pick two points on the line

(0,4) and (1,0)

We can find the slope

m = (y2-y1)/(x2-x1)

= (0-4)/(1-0)

= -4/1 =-4

We know the y intercept is 4

The slope intercept form of the equation is y = mx+b where m is the slope and b is the y intercept

y = -4x+4

ira [324]3 years ago

3 0

Answer:

-4

Step-by-step explanation:

Using (1,0) and (0,4)

Slope: (4-0)/(0-1)

4/-1

-4

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The compressive strength of concrete is being tested by a civil engineer who tests 12 specimens and finds that the sample mean i

ki77a [65]

Answer:

The 95% confidence interval for mean compressive strength is:

$3237.3\leq \mu\leq 3282.5$

Step-by-step explanation:

We have a sample of n=12 specimens, with sample mean=3259.9 and sample standard deviation = 35.57.

We know the population is normally distributed.

For a 95% confidence interval and df=n-1=11, the t-statistic is t=2.201.

Then, the CI can be expressed as:

$M-t*s/\sqrt{N}\leq \mu\leq M+t*s/\sqrt{N}\\\\3259.9-2.201*35.57/\sqrt{12}\leq \mu\leq 3259.9+2.201*35.57/\sqrt{12}\\\\ 3259.9-22.6\leq \mu\leq 3259.9+22.6\\\\3237.3\leq \mu\leq 3282.5$

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3 years ago

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Kryger [21]

Answer:

Step-by-step explanation:

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3 years ago

What is next step in solving this equation <br> 32x+2=40

Alenkinab [10]

Answer:

32x+2=40

-2 -2

32x=42

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3 years ago

Find the measure of the smallest angle?

weeeeeb [17]

Answer:

m ∠RMK = 51°

Step-by-step explanation:

m ∠JMK = m ∠RMK + m ∠JMR

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33 = 3x

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3 years ago

P+7 – 5 = –10 – 3p<br><br> Step by step

oksian1 [2.3K]

Step-by-step explanation:

you add the three p to p and that's 4p and

4p+7-5=-10

4p-2=-10

+2=+2

4p=-8

devide by four on both side so p is-2

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3 years ago