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mihalych1998 [28]
3 years ago
11

There are 13 fish in an aquarium. Seven of the fish are guppies. How many non-guppies are in the aquarium? A. The number of gupp

ies. B. The number of non-guppies. C. The total number of fish.
Mathematics
1 answer:
Paladinen [302]3 years ago
3 0
A.7 guppies
B.6 non-guppies
C.13 fish
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I know I need to use the change of base
Zinaida [17]
The change of base formula looks like this:
                                           log x
(log to the base b of ) x = -----------    (you could also use ln instead of log)
                                            log b

                                                       log 40       1.602
Then (log to the base 7 of) 40 = ------------ = ------------- = 1.896   (answer)
                                                        log 7         0.8451

check (on calculator):    7^1.896 = 40.023   (close enough to 40 to verify 
                                                                     that this method "worked")
7 0
3 years ago
How do you write 9/10 as a percentage
Tomtit [17]

#To make a fraction into percentage, the easy way is to times the fraction with 100

<h3>The percentage of 9/10</h3>

9/10 × 100 = 90

#and so, the percentage of 9/10 is 90%

<h3>Answer : 90%</h3>
3 0
3 years ago
I need help can you please explain where does the 8 come from
BaLLatris [955]
Since you want to cancel something out, the book makes the 24 3 times eight so that both of the threes can be canceled out
5 0
3 years ago
2.
diamong [38]

Answer:

what is the answer choices?

8 0
3 years ago
In a triangle , the measure of the first angle is twice the measure of the second angle. The measure of the third angle is 100 m
madam [21]

Answer:

The three unknown angles X, Y , and Z are:

X = 40, Y = 20, and Z = 120

Step-by-step explanation:

Let's name X the measure of the first angle, Y the measure of the second one, and Z that of the third one.

Then we can create the following equations:

X = 2 Y

Z = 100 + Y

and

X + Y + Z = 180

So we use the first equation and the second one to substitute for the variable X and Z in the thrid equation:

2 Y + Y + (100 + Y) = 180

4 Y + 100 = 180

4 Y = 80

Y = 80/4 = 20

Then X = 40, Y = 20, and Z = 120

7 0
2 years ago
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