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qwelly [4]
3 years ago
10

Given N(14,4), find the z score for 9

Mathematics
1 answer:
algol133 years ago
6 0

Step-by-step explanation:

Formula:  z = (x-μ)/σ

So, plug in the numbers.

N(14,4), find the z score for 9

x is the number you're finding, so x=9

μ is the mean, so μ = 14

σ is the st. deviation, so σ=4

Plug them in, so it's z=(9-14)/4 and you'll get your answer :)

hint: it should be a negative number

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MrRissso [65]

The angle B will be equal to ∠B=53.13 degrees.

<h3>What is the triangle?</h3>

Triangle is a shape made of three sides in a two-dimensional plane. the sum of the three angles is 180 degrees.

It is given that:-

Three sides of the triangle are:- a= 3, b=4  and c =5

The angle B will be calculated by the following formula;-

\angle B=Cos^{-1}\dfrac{a^2+c^2-b^2}{2ac}\\\\\\\angle B=Cos^{-1}\dfrac{3^2+5^2-4^2}{2\times 3\times 5}\\\\\\\angle B=Cos^{-1}(0.6)\\

∠B=53.13 degrees

Hence the angle B will be equal to ∠B=53.13 degrees.

To know more about triangles follow

brainly.com/question/17335144

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2 years ago
I need help, please answer A and B.
qwelly [4]

Answer:

a. 81 square inches

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Step-by-step explanation:

The area of all 5 squares combined is 405 square inches. This is 5 times the area of 1 square. 405/5 = 81. The area of 1 square is 81 square inches.

Since this is a square, the sides are equal. Thankfully the area of 1 square is a perfect square so the length of one side of the square is a full number, which is 9. All of the squares are congruent as shown in the diagram so we simply add every length together (there are 12 sides, each side is 9 inches).

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