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2 years ago

What is an equation of the line that passes through the points (0, -5) and (-5, -1)?

Mathematics

1 answer:

nataly862011 [7]2 years ago

5 0

Answer:

y=mx+b

y=-4/5x+5b

Step-by-step explanation:

(0,-5)

(-5,-1)

-1+5 is 4

-5-0 is -5

-4/5 is the slope

use one of the points and substitute x to find the y intercept, which gives you the full equation, which is y=-4/5x+5

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A psychologist takes an SRS of 404040 people in their twenties and 606060 people in their fifties and surveys them about their a

Leto [7]

Answer: Approximately normal, because we expect 19.2 successes and 20.8 failures from people in their twenties, and 16.8 and 43.2 from people in their fifties, and all of these counts are at least 10.

Step-by-step explanation:

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2 years ago

Find the slope of each line.

REY [17]

The slope is 4/3.
I hope this helps :)

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2 years ago

Find the sample size, n, needed to estimate the percentage of adults who have consulted fortune tellers. Use a 0.02 margin of er

Brrunno [24]

Answer: 2172

Step-by-step explanation:

Formula to find the sample size n , if the prior estimate of the population proportion(p) is known:

$n= p(1-p)(\dfrac{z^*}{E})^2$ , where E= margin of error and z* = Critical z-value.

Let p be the population proportion of adults have consulted fortune tellers.

As per given , we have

p= 0.20

E= 0.02

From z-table , the z-value corresponding to 98% confidence interval = z*=2.33

Then, the required sample size will be :

$n= 0.20(1-0.20)(\dfrac{2.33}{0.02})^2$

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3 0

2 years ago

How do you solve this problem: x/3-8=2. What do you get for x step by step please.

Kazeer [188]

Step 1: x/3-8=2
Step 2: x/-5=2
Step 3: -10/-5=2
Step 4: x=-10

Step 1: First, subtract 8 from 3. 3-8=-5.
Step 2: Replace 3-8 with -5.
Step 3: To find x, multiply -5 and 2. The answer is -10.
Step 4: Write out the final answer, which is x=-10

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3 years ago

Tim knows the volume and base area of a wooden chest that is in the shape of a rectangular prism. If the volume is 524 cubic uni

Alexandra [31]

Answer: 34.93 units

Step-by-step explanation:

The volume of a rectangular prism can be calculated with this formula:

$V=Bh$

Where "V" is the volume, "B" is the base area and "h" is the height.

Since we need to find the height, we must solve for "h":

$h=\frac{V}{B}$

We know that the volume of that wooden chest (which is in the shape of a rectangular prism) is 524 cubic units and the base area is 15 square units. Then:

$V=524units^3\\B=15units^2$

Subsitituting these values into $h=\frac{B}{V}$ , we get that the height of the chest is:

$h=\frac{524units^3}{15units^2}=34.93units$

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2 years ago