Which place value would you look to compare 225998 and 225988

Mathematics

1 answer:

Jobisdone [24]4 years ago

6 0

225998 225988
I believe it is the tenths place
(the bold digits)

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If 3a-2b= 8 and a+3b=7 what is the value of 4a+b?

Fittoniya [83]

Step 1: Find the value of one variable in terms of the other.

$a+3b=7\\a=7-3b$

Step 2: Substitute the value you just found for this variable in the other equation.

$3a-2b=8\\3(7-3b)-2b=8\\21-9b-2b=8\\21-11b=8\\21=8+11b\\13=11b\\\frac{13}{11}=b\\ b=1\frac{2}{11}$

Step 3: Use your new value for the second variable to find the first.

$a+3b=7\\a+3(1\frac{2}{11})=7\\a+3\frac{6}{11}=7\\\\a=3\frac{5}{11}$

Now that we know the values for a and b we can find the value of 4a+b.

$4a+b\\4(3\frac{5}{11})+1\frac{2}{11}\\12+\frac{20}{11}+1\frac{2}{11}\\\\12+1\frac{9}{11}+1\frac{2}{11}\\\\\boxed{15}$

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3 years ago

I need help on to wich expresion has the least value 10 second challenge

Nimfa-mama [501]

Answer:

The first one.

Step-by-step explanation:

Both of the equations in the parenthesis have the same value, and 1/2 isn't as much as a whole.

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3 years ago

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What is the estimate of 137,638 plus 52,091