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siniylev [52]
3 years ago
7

4a^{2}+9b^{2} -x^{2} -1+12ab-2xy can someone explain this pls it's hurting my brain:,)

Mathematics
1 answer:
postnew [5]3 years ago
5 0
It’s an expression. there is no like terms within the expression so it remains the same. each variable is different because of either the “a, b, x, y” or the squared.
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3 0
3 years ago
I have no clue what is even happening in this qs! help
Margarita [4]

Answer:

9

Step-by-step explanation:

median: The middle number after the numbers have been sorted into ascending or descending order.

Mean: The quotient of the numbers added together then divided by the amount of numbers.

So if 9 were the missing number the median would be 5 because in ascending order it would look like this:

1, 3, 5, 7, 9

and as you can see 5 is in the middle.

The mean would also be 5 because

1+ 3+ 5 + 7 +9 =25

and 25 divided by 5 equals 5

So therefore the missing number must be 9.

(Also it was obvious that they just added 2 to each number)

4 0
2 years ago
Sophia pays a $19.99 membership fee for an online music store. a. If she buys two songs at a price of $0.99 each, what is the to
drek231 [11]
First, how much were her songs? It's two songs each, and their separate prize was 0.99:

total prize was 2*0.99=1.98

this gets added to the membership prize:

19.99+1.98=21.97

you can also calculate this by rounding all the numbers (20+1+1) and substracting the amount you rounded (three times one cent) - the result would be the same.
8 0
4 years ago
Kelsie sold digital cameras on her website. She bought the cameras for 465 each and included a 60% markup to get the selling pri
melamori03 [73]
Each camera costs $651 dollars, assuming I understood the question format correctly.
Find 60% of 465, which is 186. Because it is markup, add 186 to the original price. 465+186 = 651.
Therefore, the price is $651.
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4 years ago
is (x+5) a factor of f(x)=x^3 - 4x^2 + 3x + 7? Use either the remainder theorem or the factor theorem to explain your reasoning.
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4 0
3 years ago
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