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3 years ago

(Photo above! How would I find the area of this?

Mathematics

2 answers:

boyakko [2]3 years ago

7 0

It is basically a square attached by a small rectangle. So figure out the area of the square and add it to the area of the rectangle and don't forget to label your answer. Hope this helped :)

LenKa [72]3 years ago

3 0

Split the shape horizontily so it shows two rectangles. Then find the area of each shape dividually

20*20= 400
Then add
20+12
(To get the missing length of the bottom side)

32*7 =224

400+224=624!

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An x-intercept of a graph is the location where the<br> graph crosses the:

vivado [14]

Answer:

x-axis

Step-by-step explanation:

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2 years ago

Read 2 more answers

A consumer group has determined that the distribution of life spans for gas ranges (stoves) has a mean of 15.0 years and a stand

Art [367]

Answer:

b. Mean = 1.6 years, standard deviation - 0.92 years, shape: approximately Normal.

Step-by-step explanation:

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

Subtraction of normal Variables:

When we subtract normal variables, the mean is the subtraction of the means, while the standard deviation is the square root of the sum of the variances.

A consumer group has determined that the distribution of life spans for gas ranges (stoves) has a mean of 15.0 years and a standard deviation of 4.2 years. Sample of 35:

This means that:

$\mu_G = 15$

$s_G = \frac{4.2}{\sqrt{35}} = 0.71$

The distribution of life spans for electric ranges has a mean of 13.4 years and a standard deviation of 3.7 years. Sample of 40:

This means that:

$\mu_E = 13.4$

$s_E = \frac{3.7}{\sqrt{40}} = 0.585$

Which of the following best describes the sampling distribution of the difference in mean life span of gas ranges and electric ranges?

Shape is approximately normal.

Mean:

$\mu = \mu_G - \mu_E = 15 - 13.4 = 1.6$

Standard deviation:

$s = \sqrt{s_G^2+s_E^2} = \sqrt{0.71^2+0.585^2} = 0.92$

So the correct answer is given by option b.

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3 years ago

Help! im awful at these problems!!<br> solve the formula: t=v+k/g for g.

Sedbober [7]

Answer:

g = $\frac{k}{t-v}$

Step-by-step explanation:

Given

t = v + $\frac{k}{g}$

Multiply through by g to clear the fraction

tg = vg + k ( subtract vg from both sides )

tg - vg = k ← factor out g from each term on the left side

g(t - v) = k ← divide both sides by (t - v)

g = $\frac{k}{t-v}$

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3 years ago

How can you show that two objects are proportional with an equation

masha68 [24]

For an equation to be proportional, it must have no y intercept, and it must have a slope. So,
<span>y=4x+4 This equation isn't proportional because it has a y-intercept (+4)
y=4x+2 </span>This equation isn't proportional because it has a y-intercept (+2)
y=4x This equation is proportional because it has no y-intercept, and a slope.

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3 years ago

A subway train makes six stops of equal length during its 21 km run. The train is actually moving for 20 minutes of the trip. At

photoshop1234 [79]

Answer:

The subway train can stop for a maximum of 2.5 minutes on each stop.

Step-by-step explanation:

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3 years ago