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3 years ago

A rectangular room has a perimeter of 70m and is 20m long write an equation to represent the area

Mathematics

1 answer:

sveta [45]3 years ago

4 0

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What is the slope of the line through the points (-2, -1) and (4, 3)?

Natalka [10]

Answer:

#2 option: $\frac{2}{3}$

Step-by-step explanation:

$slope=\frac{rise}{run} =\frac{y^2-y^1}{x^2-x^1}$

$\frac{3-(-1)}{4-(-2)}=\frac{-4}{-6} =\frac{-2}{-3} =\frac{2}{3}$

= $\frac{2}{3}$

8 0

2 years ago

The weights of red delicious apples are approximately normally distributed with a mean of 9 Ounces and a standard deviation of 0

Simora [160]

Answer:

The mean of W is 55 ounces.

The standard deviation of W is 4.33 ounces.

Step-by-step explanation:

Let X: weight of a red delicious apple, and B: the weight of the box and packing material.

The distribution that will represent W: the total weight of the packaged 5 randomly selected apples will be also normally distributed.

Applying the property of the mean: $E(aX)=aE(X)$ , the mean of W will be:

$\mu_W=E(W)=E(5X+B)=5E(X)+E(B)=5*9+10=45+10=55$

Applying the property of the variance: $V(aX+b)=a^2V(X)$ , the variance of W will be:

$\sigma^2_W=V(W)=V(5X+B)=5^2V(X)+V(B)=25*0.75+0=18.75$

The mean standard deviation of W will be the squared root of V(W):

$\sigma_W=\sqrt{V(W)}=\sqrt{18.75}=4.33$

The mean of W is 55 ounces.

The standard deviation of W is 4.33 ounces.

3 0

3 years ago

What is the closest perfect square greater than 54

Anna35 [415]

Answer:

Step-by-step explanation:

Perfect squares are integers multiplied by themselves.

2 times 2 = 4
3 times 3 = 9
4 times 4 = 15

The closest perfect squares to 54 are 49 (7^2) and 64 (8^2).

49 is less than 54, so that's ruled out.

Therefore, the closest perfect square to 54 that is greater than it is 64.

6 0

3 years ago

The graph below is used by company 2 to show the average monthly electric cost based on the electricity provider.

Simora [160]

Answer:

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Please help ! It's timed! (More questions)

Oksi-84 [34.3K]

Answer:

Q2 : y= -2x+9

Q4: y= 2x+8

4 0

3 years ago