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ankoles [38]
3 years ago
11

What is 5 1/2 x 2 1/3

Mathematics
2 answers:
Papessa [141]3 years ago
4 0
<span>5 1/2 x 2 1/3</span>

Change your fractions into decimals.

1/2 = 0.5
1/3 = 0.33 (rounded)

5.5 x 2.33 = 12.815

12.815 is your answer

hope this helps
Setler79 [48]3 years ago
4 0
Disregard the first answer to this it is incorrect...
Turn your fractions into improper, then multiply straight across for an answer of 77/6 or 12 and 5/6
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Prove that (a-b) x (a+b)=2a x b is true.<br> (a and b are vectors)
Anon25 [30]
(a-b) X (a+b)
=  aXa - bXa +aXb -bXb (distributing)

Now, cross product of a vector with itself = 0
so, aXa = 0, bXb = 0

Also, aXb = - bXa

so,
(a-b) X (a+b) = 0 + aXb + aXb + 0
= 2aXb

hence, proved :)

6 0
3 years ago
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Is the following correspondence a function
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No, because element b has 2 correspondents.
7 0
3 years ago
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If a globe rotates 150 degrees in 5 seconds, how many rotations does it make in 30 seconds? I got 900 seconds for my answer am I
Maksim231197 [3]

Start with a proportion, to get the number of degrees in 30 seconds:

         (150 degrees / 5 seconds) = ('D' degrees / 30 seconds) .

Cross multiply the proportion:  (150 x 30) = 5 x D

                                                     4,500  =  5 x D

Divide each side by  5 :                  900 = D

The globe turns 900 degrees in 30 seconds.

How many rotations is that ?
Each rotation is 360 degrees.
So 900 degrees is
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8 0
3 years ago
Amanda wants to buy a new iPod that costs $250. When she gets to the Apple store
malfutka [58]

Answer:

Answer:

15% off 212.5

30% off 175$

Step-by-step explanation:

15+15=30 so

250/100=2.5

2.5x30=75

250-75

8 0
2 years ago
The roots of the quadratic equation $z^2 + bz + c = 0$ are $-7 + 2i$ and $-7 - 2i$. What is $b+c$?
Alexxx [7]

Answer:

67

Step-by-step explanation: Given the quadratic equation $z^2 + bz + c = 0$, Vieta's formulas tell us the sum of the roots is $-b$, and the product of the roots is $c$. Thus,

\[-b = (-7 + 2i) + (-7 - 2i) = -14,\]so $b = 14.$

Also,

\[c = (-7 + 2i)(-7 - 2i) = (-7)^2 - (2i)^2 = 49 + 4 = 53.\]Therefore, we have $b+c = \boxed{67}$.

There are many other solutions to this problem. You might have started with the factored form $(z - (-7 + 2i))(z - (-7 - 2i)),$ or even thought about the quadratic formula.

This is the aops answer :)

8 0
2 years ago
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