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3 years ago

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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We have given two complex numbers

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

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