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ivanzaharov [21]
3 years ago
6

Help asap

Mathematics
1 answer:
Tasya [4]3 years ago
5 0

Using improper fractions, it is found that they broke the record and were 0.8 minutes faster.

<h3>How to convert improper fractions to standard fractions?</h3>

The conversion is made according to the following formula:

a\frac{b}{c} = a + \frac{b}{c} = \frac{ac + b}{c}

In this problem, the time had to be faster than 12\frac{2}{5} minutes, which is a time in minutes of:

12\frac{2}{5} = 12 + \frac{2}{5} = 12 + 0.4 = 12.4

Researching the problem on the internet, it is found that their time was of 11\frac{3}{5} minutes, hence:

11 + \frac{3}{5} = 11 + \frac{3}{5} = 11 + 0.6 = 11.6

11.6 < 12.4, hence they broke the record.

12.4 - 11.6 = 0.8, hence they were 0.8 minutes faster.

You can learn more about improper fractions at brainly.com/question/14759886

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Rufina [12.5K]
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5 0
3 years ago
Irene uses 9.6 pints of white paint and blue paint to paint her bedroom walls. 3 4 of this amount is white paint, and the rest i
Darina [25.2K]

Answer:

8

Step-by-step explanation:

9.6 divided by 3/4 = 0.8, so 8. Correct me if I'm wrong ya'll.

3 0
3 years ago
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miss Akunina [59]
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8 0
3 years ago
Which of the following is a solution of the system 2x + y = 9 and 3x + 5y = 19.​
Nezavi [6.7K]

2x+y=9

3x+5y=19

I will do this problem in 2 ways. I.)Substitution II.)Elimination

Solution I.) Substitution

We can subtract 2x from both sides in the first equation.

y=9-2x

Now we can substitute the y in the second equation with 9-2x

3x+5(9-2x)=19

-7x+45=19

-7x=-26

x=26/7

y=9-2(26/7)=11/7

Solution II.)Elimination

We can multiply both side of first equation by 5 to get a 5y in both equations.

10x+5y=45

Now because both are positive 5y we just need to do simple subtraction of the 2 equation, each side respectively.

(10x+5y)-(3x+5y)=45-19

7x=26

x=26/7

2*26/7+y=9

y=11/7

Ultimately you get the same answer, both are viable methods, some problems are faster with one method but I recommend mastering both since they are very useful.

4 0
3 years ago
Write sin 29 degrees 32 minutes in terms of it cofunction
12345 [234]

Answer:

Sin 29° 32' = Cos 60° 28'

Step-by-step explanation:

Here in this problem, we have to write Sin 29° 32' in terms of its co-function.

We know that co-function of Sin Ф = Cos ( 90° - Ф ).

Therefore, we have to find a complementary angle of 29° 32'.

So, ( 90° - 29° 32' ) = 60° 28'

Therefore, Sin 29° 32' = Cos 60° 28' ( Answer )

5 0
3 years ago
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