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ladessa [460]
3 years ago
5

Roberto studied 3/5 hour every day for 7 days. How many hours did Roberto study in 7 days?

Mathematics
2 answers:
slavikrds [6]3 years ago
5 0
I believe it would be 4 1/5 hours
olganol [36]3 years ago
4 0
Let me explain how you do this 
if for 1 day he studies 3/5s of an hour. And the question is asking for 7 days then all we have to do is multiply 3/5s times 7! Ill guide you through the math;)
 3                                                               3         7    
----   x   7  we can also write it like this   ---   x   ---   lets use this one:)  
 5                                                               5         1

but now our next step is to multiply across!
 
<span> 3         7   =   3 x 7 = 21 
</span>---   x  ----                       so our new fraction issssss
 5         1   =   5 x 1 = 5 

 21
-----   and since 5 goes into 21 four times and 2 is left over this is how         5     much he studied in 7 days  4.2 hours
or as a fraction...
    1
4 ----
    5
answer? 4.2 hours studied :D
have a good one and 
MARK ME BRAINLIEST!!:D
thxx bye 

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Whats the correct answer??
Tpy6a [65]

use the midpoint formula. It's x1 + x2 / 2, y1+y2/2. When you solve you get (0, 1/2) is the midpoint. Hope this helps


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vaieri [72.5K]

Answer:

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Step-by-step explanation:

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Find the decimal equivalent of ¾ ounce to the thousandths place
GalinKa [24]

0.75

Explanation:

Every 1/4 is 25. If you want to calculate them, then you're going to need 1/4 to find 25. In some other cases, 25, can also be written as another decimal. Such as, 4/100.

100/4 is 25. For example:

Woah! You have 3/4 of a dollar. You're really saving up money fast!

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2 years ago
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faltersainse [42]
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2 years ago
A pharmacist wants to make 36ml of a 65% hydrogen peroxide solution. how many pls of 75% hydrogen peroxide must he mix with 57%
faltersainse [42]

Answer:

16 mls of the 75% solution and 20 mls of the 0.57% solution.

Step-by-step explanation:

Set up a system of equations:

Let x = volume of 75% solution and y be volume of 57% solution

0.75x + 0.57y = 36*0.65

0.75x + 0.57y = 23.4.......(1)

x + y = 36.........(2)

From equation (2):

y = 36 - x

Substituting this into equation(1):

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0.75x + 20.52 - 0.57x = 23.4

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x = 2.88/0.18

x = 16

so from equation (2): y = 36-16 = 20.

8 0
2 years ago
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