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SpyIntel [72]
3 years ago
9

What are the building blocks of geometry?

Mathematics
1 answer:
NemiM [27]3 years ago
5 0
This is a very general question but i would say
Rays- One direction arrows
Lines- line segment with arrows in both directions
Planes
Bisects
Colinear
Co planar
stuff like this builds geometry
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the side length of a square can be expressed as 2x+3. If the area of the square is 121 square meters, what is the value of x?
lyudmila [28]

Answer:

x=4

Step-by-step explanation:

(2x+3)^2=121

2x+3=square root of 121

2x+3=11

2x=11-3

2x=8

x=4

(in a square all sides are equal therefore area =length ×width where length and width=2x+3)

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3 years ago
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Solve for x <br> Picture is above
Phantasy [73]

Answer:

x = 10

Step-by-step explanation:

a² + b² = c²

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36 + 64 = 100

√100 = ±10

x = 10

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3 years ago
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Mrac [35]

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3 0
3 years ago
Here are summary statistics for randomly selected weights of newborn​ girls: n=185​,
Anna11 [10]

Answer:

The confidence  interval for the population mean μ​ is 32.487

Step-by-step explanation:

Given :

Number of weights of newborn​ girls n=185.

Mean \bar{x}=31.4 hg

Standard deviation s=7.5 hg

Use a 95​% confidence level i.e. cl=0.95

To find : What is the confidence interval for the population mean μ​?

Solution :

Using t-distribution,

The degree of freedom DF=n-1=185-1=184

\alpha=\frac{1-0.95}{2}

\alpha=0.025

The t critical value is t=1.973.

The confidence interval build is

CI=\bar{x}\pm(t\cdot \frac{s}{\sqrt{n}})

Substitute the values,

CI=31.4\pm(1.973\cdot \frac{7.5}{\sqrt{185}})

CI=31.4\pm(1.973\cdot 0.5514)

CI=31.4\pm(1.087)

31.4+1.087

32.487

Therefore, the confidence  interval for the population mean μ​ is 32.487

6 0
3 years ago
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