I prefer to use compatible numbers because by using this method it is easier to make a sum mentally. This is true because compatible numbers are close in value to the actual numbers. For a better understanding, let's take an example:
Suppose you have two numbers, namely 640 and 40. These two numbers are compatible for division because:
64 ÷ 4 = 16
So, we have used mental arithmetic to solve a more complex problem.
Answer:
.122
Step-by-step explanation:
.05+1.2(.11-.05)
.05+1.2(.06)
.05+.072 = .122
Answer:
E(-3,4) and F(2,9)
Step-by-step explanation:
If we plug in for x to see what we get for y:
(1,8):
y = 2(1)^2+ 3(1) - 5
y = 2 + 3 - 5
y = 0
This is wrong.
(-5,10):
y = 2(-5)^2 + 3(-5) -5
y = 50 - 15 - 5
y = 30
This is wrong.
(3,6):
y = 2(3)^2 + 3(3) - 5
y = 18 + 9 - 5
y = 22
This is wrong.
(-3, 4):
y = 2(-3)^2 + 3(-3) - 5
y = 18 - 9 - 5
y = 3
This is correct!
Lets check the last one...:
(2,9):
y = 2(2)^2 + 3(2) - 5
y = 8 + 6 - 5
y = 9
This is also correct!
So your right answers are:
E and F!
Hope this helps! :D
These districts are best characterized as Proportional Representation districts.
What is Proportional Representation?
There are numerous types of proportional representation systems, but they all have two things in common. They start by using districts with multiple members.
Proportional Representation, abbreviated as PR, uses significantly bigger districts that elect multiple members at once, such as five or ten, rather than electing one member of the legislature in each local district. Second, the percentage of votes a party receives in these districts with several members determines which candidates gain the seats.
The Proportional Representation system of America overcomes the wide ranging drawbacks of single-district voting system like not representing the large number of voters, discrimination against third parties, etc.
Learn more about Proportional Representation here:
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