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3 years ago

What is the y-intercept of a line that has a slope of -3 and passes through point (0, -7)?

Mathematics

1 answer:

vova2212 [387]3 years ago

7 0

Answer:

0,-7

Step-by-step explanation:

y=mx+b

slope is m and y intercept is b

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You might be interested in

12.8 x 3/4 I don’t know it

scoray [572]

48/5 or 9 3/5

12.8/1 x 3/4 = 38.4/4

Or multiply 12.8/1 by 10 ==> 128/10

128/10 x 3/4 = 384/40

Hope this helps!

7 0

3 years ago

Read 2 more answers

An isosceles trapezoid has a perimeter of 40.8 millimetres. Its shorter base measures 1.4 millimetres and its longer base measur

klio [65]

Answer: 10.6 mm

Step-by-step explanation:

Perimeter (P) is the sum of the sides.

The trapezoid has 4 sides: the shorter base = 1.4mm

the longer base = 16.6mm

the left side = x

the right side = x

P = short base + long base + left side + right side

40.8 = 1.4 + 16.6 + x + x

40.8 = 18 + 2x

21.2 = 2x

10.6 = x

3 0

3 years ago

The number of cars running a red light in a day, at a given intersection, possesses a distribution with a mean of 2.4 cars and a

liberstina [14]

Answer:

The sampling distribution of the sample mean is:

$\bar X\sim N(\mu_{\bar x}=2.4,\ \sigma_{\bar x}=0.40)$

Step-by-step explanation:

According to the Central Limit Theorem if we have a population with mean μ and standard deviation σ and appropriately huge random samples (n > 30) are selected from the population with replacement, then the distribution of the sample mean will be approximately normally distributed.

Then, the mean of the distribution of sample means is given by,

$\mu_{\bar x}=\mu$

And the standard deviation of the distribution of sample means is given by,

$\sigma_{\bar x}=\frac{\sigma}{\sqrt{n}}$

Let X = number of cars running a red light in a day, at a given intersection.

The information provided is:

$E(X)=\mu=2.4\\SD(X)=\sigma=4\\n=100$

The sample selected is quite large, i.e. n = 100 > 30.

The Central limit theorem can be used to approximate the sampling distribution of the sample mean number of cars running a red light in a day, by the Normal distribution.

The mean of the sampling distribution of the sample mean is:

$\mu_{\bar x}=\mu=2.4$