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natka813 [3]
3 years ago
12

Which expression is equivalent to (3-5i)-(-2+i)

Mathematics
1 answer:
N76 [4]3 years ago
3 0

Answer:

-6i + 5

Step-by-step explanation:

(3-5i)-(-2+i) = 3 - 5i + 2- i = (-5i - i) + (3 + 2) = -6i + 5

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two pumps of different sizes, working together, can empty a fuel tank in 3 hours. the larger pump can empty the tank in 4 hours
bonufazy [111]
Suppose the larger pump alone can empty the tank in L hours, and the smaller pump can finish the job in S hours, then each hour the large pump empties 1/L portion of the tank, and the small pump empties 1/S per hour
Working together for three hours, they empty the whole tank, which is 100% of it, so 3/L+3/S=100%=1
Larger pump can empty the tank in 4 hours less than the smaller one, so L=S-4
replace L: 3/(S-4)+3/S=1
Make the denominator the same to solve for:
3S/[S(S-4)] +3(S-4)/[S(S-4)]=1
(3S+3S-12)/[S(S-4)]=1
(3S+3S-12)=[S(S-4)]
S^2-10s+12=0
use the quadratic formula to solve for S
S is about 8.6
The answer is not whole hour. 


8 0
3 years ago
Read 2 more answers
Help pls and no links
Nastasia [14]

Answer:

C) 4/(x+y)²

Step-by-step explanation:

start by expanding so it is written as 2÷(x+y)/(x+y)÷2.

Then rearrange so that it is 2×2/(x+y)×(x+y) or 4/(x+y)²

3 0
2 years ago
Is this right I am positive but I need to pass this test
FrozenT [24]

Answer:

It's not a polygon

Step-by-step explanation:

Polygons are always 2D. This shape is 3D. Everything else is fine.

Please mark as Brainliest! :)

Have a nice day.

3 0
2 years ago
Select Not independent or Independent for each situation. (3)
valentinak56 [21]

Answer:

A spinner is divided into three equally sized sections. The spinner is spun three times.

  • independent, since the outcome is not affected by previous spins.

A number cube is rolled twice.

  •   independent, since the outcome is not affected by previous rollings.

A bag contains 8 white balls and 3 yellow balls. Two balls are selected from the bag without replacement.

  • not  independent, since the new outcome depends on the balls that were drawn before.

Step-by-step explanation:

The outcome of an independent variable is not affected by previous outcomes or actions, while the outcome of dependent variables is affected by previous outcomes or actions.

6 0
2 years ago
What is the value of the exponential expression 16 1/2
Oksana_A [137]
<h3>♫ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ♫</h3>

➷ Anything to the power of a half means you square root it

The square root of 16 is 4

Therefore, your answer is 4

<h3><u>✽</u></h3>

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

3 0
3 years ago
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