3 years ago

Write the equation representing this line slope -4 and point (-2,5)

Mathematics

1 answer:

Flura [38]3 years ago

8 0

5=(-4)x-2. Hope this helps

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An SRS of 450 450 high school seniors gained an average of ¯ x = 20 x¯=20 points in their second attempt at the SAT Mathematics

maria [59]

Answer: (15.47, 24.53)

Step-by-step explanation:

We know that the confidence interval for population mean is given by :_

$\overline{x}\pm z^*\dfrac{\sigma}{\sqrt{n}}$

, where n= sample size.

$\sigma$ = standard deviation.

$\overline{x}$ = sample mean.

z*= Critical value.

Given : n= 450

$\overline{x}=20$

$\sigma=49$

Critical value for 95% confidence = z*=1.96 [From z-value table]

Then, the 95% confidence interval will be :-

$20\pm (1.96)\dfrac{49}{\sqrt{450}}$

$\approx 20\pm (1.96)(2.31)$

$\approx 20\pm 4.53$

$=(20-4.53,\ 20+4.53)=(15.47,\ 24.53)$

Hence, the 95% confidence interval for the mean change in score μ μ in the population of all high school seniors. : (15.47, 24.53)

3 0

3 years ago

34 over w = 40 over 100

antiseptic1488 [7]

34/w = 40/100
40w = 340
340/40 =w
w= 8.5 or 85/ 10

8 0

3 years ago

a tower casts a 450 ft shadow at the same time that a 4 ft child casts a 6 ft shadow. Write and solve a proportion to find the h

gavmur [86]

Check the picture below.

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3 years ago

Steven has a rectangular closet the length is 10 feet and the width is 48 inches determine the area of the closet in square feet

Alexxandr [17]

To be honest with u I think that u need to multiply 10 times 48.. I think thats it not sure if is the 100% correct answer

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3 years ago

Write the equation of line whose b= -1 and m=5

vovangra [49]

Answer:

Step-by-step explanation:

y=mx+b

y=5x-1

4 0

3 years ago

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