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True [87]
3 years ago
10

Number 3 plzzzzzzzzz

Mathematics
2 answers:
zhenek [66]3 years ago
5 0

Answer:

A

Step-by-step explanation:

I'm pretty sure some smart guy in Greece noticed this but:

Since 4 + 8 = 12, thats the only option where 2 of the smaller sides add up to the big one. I don't know much of the reasoning behind this but my math teacher showed it to us by using Popsicle sticks to make triangles. You can try it if that helps you think about it. Apparently, if you add up the 2 smaller sides, then it HAS to be more than the biggest side.

olchik [2.2K]3 years ago
5 0
<h3>Answer: A) 4</h3>

==========================================

For any triangle with sides a,b,c we can say that the third side c is bound by this restriction

b-a < c < b+a

where 'a' and 'b' are known values, and 'b' is the larger value. So in this case we know that a = 8 and b = 12 making this inequality

b-a < c < b+a

12-8 < c < 12+8

4 < c < 20

The unknown missing side is between 4 and 20, not including either endpoint. This means c cannot equal 4, and c cannot equal 20 either.

Since c = 4 is not possible, this points to choice A as the answer

The other values 12, 8 and 16 are all in the range from 4 to 20, so they are valid possible lengths for c.

note: I'm using the triangle inequality theorem

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Can I get some help..please?​
krek1111 [17]

Answer:

-2 and 21/50

Step-by-step explanation:

PEMDAS says that paranthases go first, so we solve 2 and 1/5 minus 33/12. 2 and 1/5 simplifies to the improper fraction, 11/5. Then we find a common denominater between 11/5 and 33/12 to get 60. 11/5=132/60, and 33/12=165/60. (132/60)-(165/60)=-33/60. Then we multipl that by 4 and 2/5, which can simplify to the improper fraction, 22/5. (22/5)*(-33/60) is -726/300, and simplifies to -2 and 21/50. Hope this helps!

7 0
2 years ago
Help show work please
pantera1 [17]
We want to get rid of the stuff in the denomenator

gcd of the denomenator is 2x
but wait, we can get rid of the deonmenator in the numerator by multiplying by 4x

muliplty the whole thing by  4x/4x

we get \frac{x(x^2)}{4(2)+2(x+4)}=\frac{x^3}{2x+16}
3 0
3 years ago
Please help! Please explain how to do this, I am so lost.
alexdok [17]
Ok, so we know that RST is equal to 6x+12
And RST is also equal to 78 + 3x-12
so we set them equal to each other

6x + 12 = 3x - 12 + 78
And simplify
3x = 54
x = 18

Finally, we solve for the angle with 18 for x

6(18) + 12
108 + 12
120

Hope this helps
8 0
3 years ago
Lilly nearly arranges 35 radio controlled cars in 5 rows on the shelf find the number of cars placed in each row
Nastasia [14]

Answer:

7 cars per row

Step-by-step explanation:

8 0
2 years ago
Can somebody please help?
RUDIKE [14]

Answer:

it would already be 5.5 so then you add 2.2

Step-by-step explanation:


6 0
3 years ago
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