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rosijanka [135]
3 years ago
14

Simplify:(2 + i) - (-3+9i)​

Mathematics
1 answer:
Goryan [66]3 years ago
6 0

Answer:

-8i + 5

Step-by-step explanation:

Open the parentheses: 2 + i + 3 - 9i

Simplify:

-8i + 5

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3 years ago
Given: ABCD is a trapezoid, m∠1=m∠2, m∠3=m∠4, AB = CD, AC ∩ BD = O <br> Prove: m∠AOD = m∠BCD
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Since AB = CD the trapezoid is isosceles, which means that ∡A = ∡D

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For the properties of parallel lines (BD and AD) crossed by a transversal (BD) we have ∡3 = ∡CBD.

Now consider triangles AOD and BCD:
∡OAD (2) = ∡ADO (3) = ∡CBD (3) = ∡CDB (4)

T<span>he sum of the angles of a triangle must be 180°, t</span>herefore:
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6 0
4 years ago
Need #47 and #48 asap!!<br> 20 pts!!
sergey [27]

Answer:

47-Step-by-step explanation:

X=121 because they are vertical angles

48- first divide 96 by 6 together the surface area of each side which is equal 16 then to find the length and the width find the square root of 16 which is 4 because it is a cube the length/width/height are all equal to four. So do 4 x 4 x 4 to find the volume of one cube. Which is equal to 64 then multiple by 8 to get the total volume 512cm^3

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