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Finger [1]
3 years ago
14

Please help!!! 25 points!! -72 + (-30) + 10 =

Mathematics
2 answers:
frez [133]3 years ago
7 0

-72-30+10.

-72-30=-102

10-102 is also the same as

-102+10

The final answer is -92

pychu [463]3 years ago
3 0

Answer:

-92

Step-by-step explanation:

-72 + (-30) + 10 =

-72+ -30

Since they both have the same sign, add and then take the sign

72+30 = 102  and then take the negative sign

-102

-102+10

They have opposite signs, so we subtract and take the sign of the larger

102 -10 = 92

And 102 was negative so take the negative sign

-92

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3 years ago
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Margaret [11]

Answer:

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Step-by-step explanation:

We have given two complex numbers

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(a) First we have to find w=z_1z_2

So w=(1+i)(2+3i)=2+3i+2i+6i^2=2+5i+6i^2

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Because when we multiply -4+5i with \frac{1}{-4+5i} it gives result as 1

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