4 years ago

How can i easily subtract and add a fraction?

Mathematics

2 answers:

gulaghasi [49]4 years ago

8 0

Line the decimals up and add like you normally would.But don't forget to put your decimal in your answer

blondinia [14]4 years ago

6 0

Line up the decmails up and add as usally

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Select the answer choice below that represents 5.9 x 10-4 in standard notation.

PIT_PIT [208]

This means that you have to move the decimal point 4 decimal places to the left, as denoted by the negative sign. Thus, this would add 3 zeros before 5. The answer would be 0.00059.

I hope the explanation was clear to you. Have a good day.

6 0

3 years ago

What is the value of x?

frez [133]

$\left\{\begin{array}{ccc}x+2y=4&\text{multiply both sides by 5}\\4x-5y=42&\text{multiply both sides by 2}\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}5x+10y=20\\8x-10y=84\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad13x=104\qquad\text{divide both sides by 13}\\\\\boxed{x=8}\\\\Answer:\ \boxed{\boxed{x=8}}$