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vlada-n [284]
3 years ago
6

HELP ME PLEASE THIS IS DUE TMR

Mathematics
1 answer:
sweet-ann [11.9K]3 years ago
8 0
What exactly do you need help with?
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If c is a real number and if 1 + i is a solution of the equation x^2 -2x + c = 0, what is the value of c?
Nana76 [90]

Answer:

c = 2

Step-by-step explanation:

Substitute x = 1 + i into the equation

(1 + i)² - 2(1 + i) + c = 0 ← distribute left side

1 + 2i + i² - 2 - 2i + c = 0 ( note that i² = - 1 )

1 + 2i - 1 - 2 - 2i + c = 0 ← collect like terms on left

- 2 + c = 0 ( add 2 to both sides )

c = 2

6 0
3 years ago
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Karin wants to use the distributive property to mentally find the value of 19⋅42+19⋅58. Which expression can she use?
devlian [24]

Answer:

19( 42+ 58)

Step-by-step explanation:

19 \cdot 42+19 \cdot 58\\

The common factor is 19

19( 42+ 58)

3 0
3 years ago
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The diameter of a circle is 13 cm. What is the radius of the circle?
nikklg [1K]

Answer:

The Radius is 6.5 cm.

Step-by-step explanation:

We know that the diameter of a circle is a line that begins on one point of a circle and ends on the opposite side. We also know that the radius is a point on the circle that starts from that point and ends at the center. Therefore, the radius would be half the diameter.

13/2 = 6.5

Hope this helped :D!

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4 times the measure of the complement of an angle is equal to / the measure of the original angle's supplement. What is the meas
WINSTONCH [101]
72 degrees if its 2/3
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Does anybody know this? I need some help​
aksik [14]

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hay multiplocalo y bxa no se ingles solo español

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