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Simplify (2 x  9)(4)can someone help me...No straight answers please...
 3 years ago
 3 years ago
Simplify (2 x  9)(4)can someone help me...No straight answers please...
 3 years ago
 3 years ago

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polpakBest ResponseYou've already chosen the best response.0
You just have to distribute the multiplication to each term \[(a + b)(c) = ac + bc\]
 3 years ago

dariamBest ResponseYou've already chosen the best response.0
isnt it multiplying? (2*9)
 3 years ago

polpakBest ResponseYou've already chosen the best response.0
So in your case you have (2x 9)(4) which is the same as (2x + (9))(4)
 3 years ago

polpakBest ResponseYou've already chosen the best response.0
Oh, is that x for multiplication? or is it an x.
 3 years ago

dariamBest ResponseYou've already chosen the best response.0
i think its multiplying... idk
 3 years ago

*_Artist_*Best ResponseYou've already chosen the best response.0
i think it is just an x
 3 years ago

polpakBest ResponseYou've already chosen the best response.0
So did that make sense with what you need to do Artist, or do you need a bit more help?
 3 years ago

polpakBest ResponseYou've already chosen the best response.0
Ok lets try this. When you multiply a sum (a + b + c+ ...) by a number k. You simply multiply each of the terms in the sum by that same number k.
 3 years ago

polpakBest ResponseYou've already chosen the best response.0
So in your case, what is the sum you're multiplying ?
 3 years ago

polpakBest ResponseYou've already chosen the best response.0
Not quite. (2x  9) is a sum.
 3 years ago

polpakBest ResponseYou've already chosen the best response.0
Specifically it is the sum of 2x and 9
 3 years ago

polpakBest ResponseYou've already chosen the best response.0
You know what a sum is right?
 3 years ago

polpakBest ResponseYou've already chosen the best response.0
One of the most important things to learn in math is the vocabulary. Otherwise it is very difficult to understand what we are talking about if we aren't using the same words for things.
 3 years ago

*_Artist_*Best ResponseYou've already chosen the best response.0
A sum is the answer of two numbers added together...
 3 years ago

polpakBest ResponseYou've already chosen the best response.0
Close. Actually a sum is a sequence of terms added together. 2 is not a sum. 2 + 3 is a sum. 2*5 is not a sum. 2+3 + 2*5 is a sum.
 3 years ago

polpakBest ResponseYou've already chosen the best response.0
Now then. For each of the sums I listed above, count the number of terms in each sum.
 3 years ago

polpakBest ResponseYou've already chosen the best response.0
Close. But notice that the 2 is not being added to the 5, it's multiplied. The terms of a sum are _ONLY_ the things being added together.
 3 years ago

polpakBest ResponseYou've already chosen the best response.0
So how many terms does that last sum have?
 3 years ago

*_Artist_*Best ResponseYou've already chosen the best response.0
*Lightbulb*...Okay...
 3 years ago

polpakBest ResponseYou've already chosen the best response.0
I am glad I fanned you btw. You've been the best student I've seen here in a long time.
 3 years ago

polpakBest ResponseYou've already chosen the best response.0
Ok so now. Going back to what I was saying before.. If you have a number k multiplied by a sum. You simply distribute the multiplication of k to each term in the sum.
 3 years ago

polpakBest ResponseYou've already chosen the best response.0
So lets look at your problem again.
 3 years ago

polpakBest ResponseYou've already chosen the best response.0
(2x  9)(4) What is the sum, and what is k?
 3 years ago

polpakBest ResponseYou've already chosen the best response.0
Yes!. But I get confused easily, so can you rewrite that as an equivalent sum (equals the same thing) so that it is explicitly two terms being _ADDED_ together?
 3 years ago

polpakBest ResponseYou've already chosen the best response.0
Can you rewrite subtraction as adding a negative?
 3 years ago

polpakBest ResponseYou've already chosen the best response.0
29 = 2+(9) 7 = 7 Right?
 3 years ago

polpakBest ResponseYou've already chosen the best response.0
So do the same thing to the subtraction you have in your sum
 3 years ago

polpakBest ResponseYou've already chosen the best response.0
I like my sums to only have addition.
 3 years ago

polpakBest ResponseYou've already chosen the best response.0
So now you have this sum (2x + 9) and you're multiplying it by (4). So to do that you just multiply each term in the sum by the 4. (a + b)(c) = a*c + b*c
 3 years ago

polpakBest ResponseYou've already chosen the best response.0
Close. Don't forget your x.
 3 years ago
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