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Firlakuza [10]
3 years ago
15

Need Help with Part b. Is part a 140 times?

Mathematics
1 answer:
Alenkinab [10]3 years ago
5 0

Answer:

1680, and No

Step-by-step explanation:

Part A: A mockingbird beats its wings 420 times per 30 seconds (half a minute). This means that a mockingbird will beat its wings 840 times per minute. Multiply this by two and you get 1680 times in two minutes.

Part B: Divide the amount of beats in a minute by 60 (because there are 60 seconds in a minute) and you get the amount of times a mockingbird beats it wings per second.

420/30 = 14 times per second

Ariel said it was 0.07 times per second which is incorrect.

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Add: (3x4 + x2 + 2) + (9x4 - x2 + x)
Contact [7]
The answers are:

A. <span>12x8 + x + 2


B. 3x2 - 2x - 7</span>
3 0
4 years ago
The graph that correctly represents the given system of equations is graph
sergij07 [2.7K]

Answer:

Step-by-step explanation:

The graph is represented graphically by drawing a point for each vertex and drawing an arc between two vertices if they are joined by an edge. If the graph is directed then...

6 0
3 years ago
What is the mean, median, and standard deviation for the following set of scores: 24, 20, 16, 18, 18, 26, 22? Please show your w
MissTica

Answer:

first: Definitions

mean: the average or the most common value in a collection of numbers

(So u add all numbers and then divide the answer by how much numbers there were)

median: Is middle value.

(example:   4, 5, 6) (The median will be the middle which is 5) (But if there are even amount of numbers like this:      4, 5, 6, 7) (Then you will get the two middle numbers which in this case are 5 and 6 you add them and then divide by 2.)

standard deviation:  measures the spread of the data about the mean value

Step-by-step explanation:

Now lets get to problem!

we have numbers:

24, 20, 16, 18, 18, 26, 22

the mean will be: 144 (remember now you have to divide by 7 because there are 7 numbers.)

So it would be 20.57

Now the median:

(Since there are 7 numbers you just find the number in the middle and that would be ur median.)

24, 20, 16, 18, 18, 26, 22

median answer: 18

Like we said: The sample standard deviation measures the spread of a data distribution of the sample. It is usually used to estimate the population standard deviation

So the standard deviation will be: 3.6

I hope this helps  :)

6 0
3 years ago
A board is 3.5 m long. Four pieces, each.4 m long, are cut off. How much is left?​
lys-0071 [83]

Answer:

1.9  m

Step-by-step explanation:

3.5 - (4*0.4)

3.5 - 1.6 = 1.9

8 0
3 years ago
The perimeter of the triangle is 13 inches. What is the length of the shortest side?
netineya [11]

Answer:

shortest side = 3 in

Step-by-step explanation:

Sum the 3 sides and equate to 13, that is

x - 5 + 6 + \frac{x}{2} = 13, that is

x + 1 + \frac{x}{2} = 13 ( subtract 1 from both sides )

x + \frac{x}{2} = 12 ( multiply through by 2 to clear the fraction )

2x + x = 24

3x = 24 ( divide both sides by 3 )

x = 8

Thus

x - 5 = 8 - 5 = 3 and \frac{x}{2} = \frac{8}{2} = 4 , then

The shortest side is x - 5 = 3 in

7 0
3 years ago
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