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Nimfa-mama [501]
3 years ago
6

If x= - 7 and y = -6, evaluate the expression.

Mathematics
1 answer:
Kay [80]3 years ago
3 0

Answer:

(-7)3 + 5(-6)

Step-by-step explanation:

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Perform the indicated operation & simplify. Express the answer as a complex number. ( 6 − 7 i ) ( − 8 + 3 i ) =___
slega [8]

( 6 − 7 i ) ( − 8 + 3 i )

First FOIL:

( 6 − 7 i ) ( − 8 + 3 i )  = -48 + 18i + 56i -21i^2

Combine like terms

                                 = -48 + 74i -21i^2

Convert i^2 = -1

                                 = -48 + 74i -21(-1)

And simplify

                                 = -48 + 74i + 21

                                 = -27 + 74i

6 0
2 years ago
Select the best answer for the question. 17. 18 is what percent of 20? A. 10% B. 90% C. 18% D. 95%
vovangra [49]
Percent formula : is/of = %/100

18 is what percent of 20...
is = 18
of = 20
% = x

sub and solve
18/20 = x/100
cross multiply
(20)(x) = (100)(18)
20x = 1800
x = 1800/20
x = 90 <=== so 18 is 90% of 20
8 0
3 years ago
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katrin [286]
5+3+-9+3=2 and then the varibles so the answer is 2 cubed
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you plant a spruce tree that grows 4 inches per year and a hemlock tree that grows 6 inches per year.
gizmo_the_mogwai [7]

Answer:

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Step-by-step explanation:

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Need help <br> Choices<br> 4<br> 3<br> 2<br> 1
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Answer:

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Step-by-step explanation:

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