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3 years ago

Which expression is equivalent to 2 (a + 3) when a = 3? 2 (3) 5 (3) 2 (3) + 3 2 (3) + 6

Mathematics

1 answer:

kenny6666 [7]3 years ago

5 0

2(3)+6

Explanation

2(3+3)=12

2(3)+6
6+6=12

Equivalent

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A triangle can be formed with side lengths 4 in, 5 in, and 8 in. a. True b. False

Brilliant_brown [7]

Triangle Inequality:
The sum of the length of any two sides of a triangle must be greater than the length of the third side.

4 + 5 = 9 > 8 Check
4 + 8 = 12 > 5 Check
5 + 8 = 13 > 4 Check

All three combinations prove true, therefore the correct answer is A) True.

3 0

4 years ago

In a bag of keys, there are 15 silver keys, 7 black keys, 8 copper keys, and 2 painted keys of various colors. One key is drawn

Svetlanka [38]

15 silver keys,
5 black keys,
11 copper keys,
4 painted

35 total

15 + 11 = 26

26/35 = 0.7428 ≈ 74.28% probability

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3 years ago

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Captain Brewster captured a pack of aliens. The following data points represent the lengths of each of the aliens' big toes (in

n200080 [17]

Answer:

15 ·

16 ···

17 ··

18 ·

Step-by-step explanation:

There were 2 aliens that each have big toes measuring 17 cm long. So, the 17 would have 2 dots above it:

17 ··

3 0

2 years ago

A researcher collects data on the number of times race horses are raced during their careers. The veterinarian finds that the av

vesna_86 [32]

Answer:

95% confidence for µ, the average number of times a horse races

(12.493 , 18.107)

Step-by-step explanation:

Explanation:-

The veterinarian finds that the average number of races a horse enters is 15.3

The mean of the sample x⁻ = 15.3

Given standard deviation of the sample 'S' = 6.8

Given sample size 'n' = 25

Degrees of freedom = n-1 =25-1 =24

The tabulated value 't' = 2.064 at two tailed test 0.95 level of significance

95% confidence for µ, the average number of times a horse races

$(x^{-} - t_{\alpha } \frac{S}{\sqrt{n} } , x^{-} + t_{\alpha }\frac{S}{\sqrt{n} } )$

$(15.3- 2.064 \frac{6.8}{\sqrt{25} } , 15.3 + 2.064\frac{6.8}{\sqrt{25} } )$

(15.3 - 2.80704 ,15.3 +2.80704)

(12.493 , 18.107)

Conclusion:-

95% confidence for µ, the average number of times a horse races

(12.493 , 18.107)

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3 years ago

On which coastline was the ancient kingdom of Kalinga located?

nikklg [1K]

It was located around the north eastern

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3 years ago

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