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lisabon 2012 [21]
2 years ago
12

How do you figure out the percentage of time you spend sleeping?

Mathematics
1 answer:
xenn [34]2 years ago
5 0
Use the number of hours you sleep and divide that by the total hours in a day so for example ( you sleep 7 hours out of a 24 hour day so, 7/24=0.29 which is 29%0
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Which expression is a difference of two terms that is equivalent to -6z + 13?
Anna71 [15]

Answer: D

Step-by-step explanation:

(5z + 15) - (11z + 2)

= (5z-11z) +(15-2)

= -6z+13

5 0
2 years ago
A starting carpenter can build a rough table in 1 hour, and a rough chair in 45 minutes. A finishing carpenter can finish each t
Delvig [45]

Answer:

I believe it is b

Step-by-step explanation:


3 0
2 years ago
Solve the system of equations using substitution.<br> Y= 2x - 10<br> Y= 4x - 8
Oksana_A [137]

Answer:

Step-by-step explanation:

4x - 8 = 2x - 10

2x - 8 = -10

2x = -2

x = -1

y = 4(-1) - 8 = -4 -8 = -12

(-1, -12)

8 0
2 years ago
(-----×1/4)÷6×3/9 I need the step to this problem so that I explain to my grandson how he he gets the answer
lesya692 [45]

Answer:

-----×1/72

Step-by-step explanation:

The <em>order of operations</em> says do these operations in order left to right. Please note that ÷ means the same as / unless you define it otherwise in your problem statement.

If you intend the ÷ symbol to be used to indicate everything to its left is divided by everything to its right, it is appropriate to use parentheses for that grouping, as in ...

  (-----×1/4)÷(6×3/9) = (-----×1/4)÷2 = -----×1/8

_____

Here, we're going to evaluate what you have written according to the usual rules as described above.

  (-----×1/4)÷6×3/9 = -----×1/24×3/9 = -----×(3/24)/9

  = -----×1/8/9

  = -----×1/72

_____

<em>Comment on the arithmetic</em>

Fractions are multiplied and divided in the usual way:

  a/b×c = (a×c)/b

  a/b/c = (a/b) × (1/c) = a/(b×c)

___

<em>Comment on fractions and parentheses</em>

Please note that parentheses are required on any numerator or denominator that consists of anything other than a single number or variable. (The exception is the case where the numerator is a product, because a·b/c = (a·b)/c with or without the parentheses.)

6 0
3 years ago
3a+5b-9: a=2, b=3 that is my question I need help
Zigmanuir [339]

Answer:

12

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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