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frutty [35]
3 years ago
11

a fish tank contains 14 goldfish and 26 guppies. if you randomly select 2 fish, what is the probability that they are both goldf

ish
Mathematics
2 answers:
andreyandreev [35.5K]3 years ago
3 0
<span>Total number of goldfish is 14. The total number of guppies = 26. The total number fish in the fish tank is 40. The probability that the first selected fish is a goldfish is 14 / 40 = 7 / 20. The probability that the second selected fish is a goldfish is 13 / 39 = 1 / 3. The probability that two randomly selected fish from a fish tank are both goldfish is 7/20 x 1/3 = 7/60</span>
aleksklad [387]3 years ago
3 0

answer on apex is 91/780

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20 cm

Step-by-step explanation:

5x + 32 + 6x + 4 = 80

11x + 36 = 80

11x = 44

x = 4

sides of triangle:

5(4) = 20 cm

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Which of these describes the equation –18x + 9y = –416?
Minchanka [31]

Answer:

We conclude the equation is linear because it can be rewritten in the form y = mx + b.

Hence, option D is correct.

Step-by-step explanation:

The slope-intercept form of the line or linear equation

y = mx+b

where

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  • b is the y-intercept

<u>Important Tip:</u>

The graph of a linear equation is always a straight line.

Convert the given equation in the slope-intercept form

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subtract 18x from both sides

18x+9y-18x = - 18x-416

simplify

9y = -18x - 416

divide both sides by 9

y=-2x-\frac{416}{9}

Now, comparing the equation y=-2x-\frac{416}{9} with a slop-intercept form of linear equation

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Therefore, we conclude the equation is linear because it can be rewritten in the form y = mx + b.

From the attached graph, is also clear that the graph of the equation y=-2x-\frac{416}{9} is a straight line.

Hence, option D is correct.

3 0
3 years ago
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Consecutive terms in an arithmetic sequence differ by a constant d. So

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Denote the n-th term in the sequence by a_n. Now that a_1=2, we have

a_n=a_{n-1}+5=a_{n-2}+2\cdot5=\cdots=a_1+(n-1)\cdot5

which means

a_8=2+(8-1)\cdot5=37
4 0
3 years ago
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