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yan [13]
3 years ago
5

The number of hours a group of 12 children in Mrs. Smith's kindergarten class read in a day.

Mathematics
1 answer:
sergey [27]3 years ago
5 0
Anwser: 30min no more
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during one semester, the time elaine spent doing homework or participating in extracurricular activities was 20 percent less tha
polet [3.4K]

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963 hours

Step-by-step explanation:

I subtracted 20 from the 981

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2 years ago
What is the rate of the boat in still water and what is the rate of the current?
Alekssandra [29.7K]

Answer: 2mp

Step-by-step explanation: Let "b" represent the speed of the boat in still water

Let "c" represent the speed of the current

Let "t" represent time

Downstream(same direction) =(b+c)*t

Upstream(against current)=(b-c)*t

(b+c)*3=24

(b-c)*4=16

3b+3c=24....all sides can be divided by 3 =b+c=8

4b-4c=16.....all sides can be divided by 4 =b-c=4

Use Elimination method

b+c=8

b-c= 4 Subtracting

=====

2c=4

find c by dividing both sides by 2. c=2

if c=2, substitute to get b

b+2=8

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======

b=6

Speed of boat in still water =6mph

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4 0
2 years ago
What name best describes this shape?
EastWind [94]

Answer: Quadrilateral

Explanation:

Any four sided polygon is considered a quadrilateral since "quad" means "four". You can think of a quad bike, which has four wheels, to help remember this math term.

Usually in problems like this, we'll be given information about if certain sides are parallel or the same length. However, we don't this info, so we cannot narrow down this classification anymore.

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2 years ago
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