Reasons why each one of those don't belong

Mathematics

2 answers:

Fudgin [204]2 years ago

7 0

Answer:

Because if you give the power of 2 to all of them you get a different number

1. 20 squared+ 21 squared = 841

Answer to number 1

Readme [11.4K]2 years ago

4 0

1) 20+21 =41. Since 20^2+21^2 both have ^2 on top. The ^2 would stay the same. So that means the answer would be 41^2 for the first one which is why it is incorrect

2)Same for this. 4^2+5^2= 9^2

3)a^2+b^2 = ab^2 because since a and b are different letters/variables you cannot combine them therefore it is just ab.

4) (-1)^2 = 1 because -1 multiply by -1 again you would get positive 1. Next you do 1+0^2 = 1. Because 0^2 is just 0 because 0times 0 =0 so 1+0 = 1

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Rosa has $117 in her savings account and $95 in her checking account. Each week she will put $21 into her savings account and $2

mr_godi [17]

Answer:

It will take Rosa 5 and a half (5.5) weeks to have the same amount of money in both accounts.

Step-by-step explanation:

For this problem, we will have to set two expressions equal to each other. The first expression will represent Rosa's saving account, which already has $117 in it. Every week ( $x$ ), she adds $21 to her savings account:

$21x+117$

The second expression will represent Rosa's checking account. Rosa's checking account already has $95 in it. Every week ( $x$ ), she adds $25 to her checking account:

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Now that we have our two expressions, set them equal to each other. This is our equation that will be used to find the number of weeks ( $x$ ) it takes until Rosha has the same amount of money in both accounts:

$21x+117=25x+95$