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3 years ago

Which of the following properties does not work for addition?

Mathematics

2 answers:

Yakvenalex [24]3 years ago

4 0

Answer:

Step-by-step explanation:

Contrary to addition, subtraction doesn't have the associative property. If we subtract the first two numbers, 10 minus 5, it gives us 5. If we move on to subtract 3, it gives us 2. However, if we subtract the last two numbers first, 5 minus 3 is 2

Simora [160]3 years ago

3 0

Answer:

I believe it is Identity

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When Klorina swims with the current, she swims 10 km in 2 h. Against the current, she can swim only 8 km in the same time. How f

nasty-shy [4]

Answer:

Klorina's rate in still water is 4.5 km/h

Current's rate is 0.5 km/h

Step-by-step explanation:

Let

x km/h = Klorina's rate in still water

y km/h = current's rate

With the current (current helps):

Distance = 10 km

Time = 2 hours

Rate = x + y km/h

$10=2(x+y)$

Against the current:

Distance = 8 km

Time = 2 hours

Rate = x - y km/h

$8=2(x-y)$

Divide both equations by 2:

$x+y=5\\ \\x-y=4$

Add these equations:

$x+y+x-y=5+4\\ \\2x=9\\ \\x=4.5\ km/h$

Subtract these two equations:

$(x+y)-(x-y)=5-4\\ \\x+y-x+y=1\\ \\2y=1\\ \\y=0.5\ km/h$

4 0

3 years ago

Plz help me ...

Novay_Z [31]

10kg=390 Rs
100kg=4 000 Rs
390x10= 3900 rs
4000-3900=100 Rs
lỗ 100rs

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3 years ago

The population of at a town has grown 2% each year. In 1998, the population of the town was about 10,000 people. What was the po

Nuetrik [128]

Answer:

10200

Step-by-step explanation:

This is an example of a compound interest. The equation for this problem is 10000*(1+2/100)^n. The n is the year as 1999 is 1 year away from 1998, you just replace n with 1 and you have a simple equation.

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What is the slope of the table? What is the y-intercept of the table?

mel-nik [20]

Slope=2
Y-intercept=12

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Bess [88]

Answer:

Step-by-step explanation:

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