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4 years ago

Plz help I am giving away 20 points!!!!!!!!

Mathematics

2 answers:

vova2212 [387]4 years ago

6 0

Okay, so on number one I have no idea. I keep getting 20 because 14 - (-3)2 = 14- (-6) which is really 14 + 6=20.

Number 2 is r+15=61

Number 3 I didn't get any of those answers because you have to solve what is in the parenthesis first so3*5= 15+1=16 then you multiply that by two giving you 16*2=32 and 42-32=10

SOVA2 [1]4 years ago

4 0

Hi!

1. The answer is D because -3 squared is 9 (it's positive because a negative times a negative equals a positive) and 14 - 9 = 5.

2. Just use common sense for this one. According to the question, 15 is LESS than 61 and r and 15 add up to get 61. Therefore, the answer will be r + 15 = 61.

3. I'm honestly not sure for this one. Doing the calculations I got 10, but there isn't a choice for that. Are you sure you copied the answers correctly?

Hope that helps! Piece of advice: problems like this are easy when you go through it slowly and use common sense. Maybe try them on your own next time? :)

Ash

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Elena L [17]

Answer:

$\frac{144a^{4}+144a^{3} - 36 - 12a} {2a+1}\\$

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$= \frac{(12a^2-3)(4a^{2} + 1 + 2 (2a)(1))}{2} * \frac{6}{2a+1}\\= \frac{(12a^2-3)(4a^{2} + 1 + 4a)}{2} * \frac{6}{2a+1}\\= \frac{(12a^2-3)(4a^{2} + 1 + 4a)}{1} * \frac{3}{2a+1}\\= \frac{3(12a^2-3)(4a^{2} + 1 + 4a)} {2a+1}\\\\= \frac{3(12a^2(4a^{2} + 1 + 4a) - 3 (4a^{2}+1+4a)} {2a+1}\\= \frac{3(48a^{4}+12a^{2}+48a^{3} - 12a^{2} -12 - 4a)} {2a+1}\\= \frac{144a^{4}+36a^{2}+144a^{3} - 36a^{2} - 36 - 12a)} {2a+1}$

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3 years ago

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We need to find the numbers between √9/3 and 2π

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using π as 3.14

2π = 2(3.14) = 6.28

Now we need to check the options for numbers that do not fall between 1 and 6.28:

a) π = 3.14

This number falls between 1 and 6.28

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