A mixture of explanations, examples, and practice problems to have you evaluating expressions with one variable in no time!

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Joy

4 years agoPosted 4 years ago. Direct link to Joy's post “I still don't understand ...”

I still don't understand the challenge problems e⋅e−5ee, dot, e, minus, 5, e when e=5e=5e, equals, 5.What does this mean?

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(76 votes)

Littleman0562

4 years agoPosted 4 years ago. Direct link to Littleman0562's post “so, e(dot)e - 5e, the dot...”

so, e(dot)e - 5e, the dot symbol represents multiplication. And 5e is another way to represent multiplication so, the expression actually looks like this: 5x5 - 5x5 which equals to 0 because 5x5 = 25, and 5x5 = 25, and subtracting 25 with 25 = 0.

e(dot)e - 5e

5x5 - 5x5 = 25 - 25

25 - 25 = 0(181 votes)

Morgan, Aaron

5 years agoPosted 5 years ago. Direct link to Morgan, Aaron's post “If 9-8/x = ? and x=4 what...”

If 9-8/x = ? and x=4 what do I do with the 8/x? Do I multiply add divide or subtract?

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(38 votes)

David Severin

5 years agoPosted 5 years ago. Direct link to David Severin's post “you substitute for x, so ...”

you substitute for x, so 9 - 8/4, do divide (8/4) first then subtract from 9.

(61 votes)

Smith Dalton

6 years agoPosted 6 years ago. Direct link to Smith Dalton's post “Why do we have to do mult...”

Why do we have to do multiplication and division first? Why to use these "order of operation"?

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(15 votes)

moralisaiah

6 years agoPosted 6 years ago. Direct link to moralisaiah's post “Here is why; "Because exp...”

Here is why; "Because exponents are simply repeated multiplication, they are performed before multiplication. ... Thus the order: parentheses first, exponents second, mutiplication and division third, and save the lowest level operations of addition and subtraction for last." Personally I believe order of operation is way to balance the equation as well. :)

(47 votes)

kme

5 years agoPosted 5 years ago. Direct link to kme's post “If you don't know what y ...”

If you don't know what y is, then you won't get an exact answer

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(18 votes)

Intellectual Genius

5 years agoPosted 5 years ago. Direct link to Intellectual Genius's post “Well you don't need to kn...”

Well you don't need to know what y is to solve the question. For example you have:6t=48. (if something is written like 6t, that always means you have to multiply, or any variable). So we have: 6t=48, we can divide both sides by 6 (we are dividing because you always do the inverse of what you are trying to solve, the opposite of multiplication is division)

we have to divide both sides by 6

6t=48, 6/6 cancels out, 48/6=8. So now the equation would look like this: t=8, and now we know what t is we can verify it. 6t=48 or 6x8=48.

And that's the beauty of Algebra!

If you need more help just tell me.

-Intellectual Genius(33 votes)

jonathan.christen

6 years agoPosted 6 years ago. Direct link to jonathan.christen's post “what is it asking me when...”

what is it asking me when it says Evaluate 2y2y when y = 6y=6

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(16 votes)

Kim Seidel

6 years agoPosted 6 years ago. Direct link to Kim Seidel's post “It means you use substitu...”

It means you use substitution... You replace the "y" in "2y" with the value you are given. Since you were told to use "y=6", you take out "y" and replace it with 6. Remember, "2y" means "2 times y", so you need a multiplication symbol. Thus, "2y" becomes "2(6)".

Then, you simplify the expression by doing the multiplication. Your final answer would be 12.Hope this helps.

(27 votes)

Mateo Gonzalez

10 months agoPosted 10 months ago. Direct link to Mateo Gonzalez's post “is it just me or is it wa...”

is it just me or is it way easier here than in class?

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(23 votes)

stargirl9th

9 months agoPosted 9 months ago. Direct link to stargirl9th's post “way easier”

way easier

(3 votes)

IHateStudying

3 years agoPosted 3 years ago. Direct link to IHateStudying's post “i can't understand the qu...”

i can't understand the question nine please help me understand

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(18 votes)

pompano [hurt lol]

3 years agoPosted 3 years ago. Direct link to pompano [hurt lol]'s post “Start out with the variab...”

Start out with the variable. What is d worth? What do you need to do with that variable in the sentence? You should see that d is worth 4, and we need to now add that in the sentence.

The sentence should now look like this -

8/4 + 3Now, solve it like you would usually do it. 8/4 is equal to 2 (We need to do it first since it is the second in the Order of Operations), and then add 3 to that 2. You should get an answer of 5 if you did all that calculation correctly.

Hope this helped!

(15 votes)

Rclxqvs_

a year agoPosted a year ago. Direct link to Rclxqvs_'s post “How do you do this with f...”

How do you do this with fractions? (I'm really bad with fractions and math)

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(11 votes)

Kim Seidel

a year agoPosted a year ago. Direct link to Kim Seidel's post “The process is no differe...”

The process is no different. You replace each variable with its given value. Then you simplify the expression following order of operations rules and the rules for working with fractions. If you aren't great at working with fractions, then do yourself a favor and get more practice on that topic.

(15 votes)

Drunkenstein

5 years agoPosted 5 years ago. Direct link to Drunkenstein's post “Does this topic have viab...”

Does this topic have viable application to non-Algebra subjects, if any? Thanx.

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(11 votes)

Kim Seidel

5 years agoPosted 5 years ago. Direct link to Kim Seidel's post “Absolutely! There are ma...”

Absolutely! There are many formulas that get used in real life situations. This teaches you how to use a formula and calculate a result based upon replacing values into the formula.

(20 votes)

jayden farrow

4 years agoPosted 4 years ago. Direct link to jayden farrow's post “so u saying if i put 5 + ...”

so u saying if i put 5 + 2b and be equal to 5 the answer would be 15

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(14 votes)

Gibson Jameson Harvey

a year agoPosted a year ago. Direct link to Gibson Jameson Harvey's post “If b=5 then yes it does. ...”

If b=5 then yes it does. it means this 5+2x5

(6 votes)