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3 years ago

A set of data items is normally distributed with a mean of 90 and a standard deviation of 12. Convert 90 to z-score

Mathematics

1 answer:

babunello [35]3 years ago

6 0

Since 90 is the mean, the z-score of the mean is always 0.

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there are 320 seats in the airplane. passengers are taking 3/5 of the seats. There are 47 seats being used by flight attendants.

iogann1982 [59]

Answer: 124

Step-by-step explanation:

Multiply 320 by 3/5 (.6) and you will get 192. Then you subtract 320 by 47 and get 316. You subtract 192 from 316 and get 124.

8 0

3 years ago

I need help with this problem if you can help please tell me what you did so I can understand please :)

balu736 [363]

The perimeter is 20 units

Step-by-step explanation:

The end-point of a side of square can be used to calculate length of a side. And the side will be used to calculate the perimeter.

Given

(3,-1) and (7,2)

Let

(3,-1) = (x1,y1)

(7,2) = (x2,y2)

We have to calculate the distance

The formula for distance is:

$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

Let s be the side of a square

then,

$s=\sqrt{(7-3)^2+(2-(-1))^2}\\s=\sqrt{(4)^2+(2+1)^2}\\=\sqrt{16+(3)^2}\\=\sqrt{16+9}\\=\sqrt{25}\\=5\ units$

The side of square is 5 units. Then,

$Perimeter=P=4s\\=5*4\\=20\ units$

The perimeter is 20 units

Keywords: Perimeter, Square

Learn more about perimeter at:

#LearnwithBrainly

6 0

3 years ago

Complete the pairs of corresponding parts if △RST ≅ △TXY.

Bogdan [553]

Answer:

∠STR = ∠XYT

Step-by-step explanation:

The triangles are give congruent.△RST ≅ △TXY.

In congruent triangles corresponding angles are equal.The order of the letters in the congruent statement matters.

In the given statement the angles matching to ∠STR is ∠XYT.

Hence ,the equal angles in the congruent triangles are ∠STR = ∠XYT.

8 0

4 years ago

Please answer this question

Yuki888 [10]

Answer:

17.3

Step-by-step explanation:

a² = b² + c² - 2bc cos A

t² = 11² + 14² - 2(11)(14) cos 87

t² = 121 + 196 - 308 (.052336)

t² = 300.88

t = 17.3

4 0

3 years ago

1 Find the probability of drawing a 7 of diamonds. ( enter your answer as a fraction.)

makkiz [27]

Answer:

1. 1/26

2. 2/52

Not sure if this is what you meant for sure.

8 0

3 years ago