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Hunter-Best [27]
3 years ago
11

Column A Column B

Mathematics
1 answer:
Dmitrij [34]3 years ago
3 0
1) (-22 + 17) + 13 = -22 + (17+13)
                - 5 + 13 = -22 + 30
                           8 = 8

2) -[27+(-3)] = -27+3
              -24 = -24

3) 35 + (-15+4) = [5+(-15)] + 4
         35 + (-11) = 20 + 4
                     24 = 24

4) -12 + 6 = 6 + (-12)
            - 6 = - 6

Answer: C


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Answer:

I think its A

Step-by-step explanation:

The graph shows its number are getting greater than -4 and i think solid dots mean greater than or equal to the number

8 0
3 years ago
What is the area of a triangle that has a height of 8 feet and a base length of 5 feet?
Lena [83]

Answer:

20 ft²

Step-by-step explanation:

the area (A) of a triangle is calculated using the formula

A = \frac{1}{2} bh ( b is the base and h the height )

here b = 5 and h = 8

A = \frac{1}{2} × 5 × 8 = 20 ft²


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3 years ago
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Help me on this question it should be easy but I just wanna make sure ;)
FinnZ [79.3K]

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HELP TUTOR…<br> ss<br> z<br> z<br> z<br> z
kondor19780726 [428]

Answer:

A)σ = 15.37 miles per hour

B) σ = 55.10 miles per hour

C) 39.73 miles per hour

Step-by-step explanation:

Formula for standard deviation is;

σ = √(Σ(x - μ)²)/(n - 1)

A) For large wild cats;

μ = Σx/n = (70 + 40 + 30 + 40 + 35 + 35 + 35 + 35 + 10)/9 = 36.67

σ = √((70 - 36.67)² + (40 - 36.67)² + (30 - 36.67)² + (40 - 36.67)² + (35 - 36.67)² + (35 - 36.67)² + (35 - 36.67)² + (35 - 36.67)² + (10 - 36.67)²)/(9 - 1)

σ = √236.1139

σ = 15.37

B) For various birds;

μ = Σx/n = (218 + 106 + 97 + 56 + 66 + 39 + 55 + 32 + 54 + 20 + 25 + 25)/12

μ = 66.0833

σ = √((218 - 66.0833)² + (106 - 66.0833)² + (97 - 66.0833)² + (56 - 66.0833)² + (66 - 66.0833)² + (39 - 66.0833)² + (55 - 66.0833)² + (32 - 66.0833)² + (54 - 66.0833)² + (20 - 66.0833)² + (25 - 66.0833)² + (25 - 66.0833)²)/(12 - 1)

σ = √3035.72

σ = 55.10

C) difference in standard deviations = 55.10 - 15.37 = 39.73 miles per hour

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3 years ago
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