You have to change the sign of the imaginary part. Which is -4i. 4+4i is the opposite of 4-4i.
Answer:
Christie spent 17.64$.
Step-by-step explanation:
0.2 x 15.50 = 3.1
15.50 + 3.1 = 12.4
0.2 x 5.50 = 1.1
5.50 - 1.1 = 4.4
12.4 + 4.4 = 16.8
0.05 x 16.8 = 0.84
0.84 + 16.8 = 17.64
Answer: 90°
Explanation: the sum of all the angles in a triangle = 180. So 70 + 30 = 90 and 180-90=90
Answer:
0.25 and 25%
Step-by-step explanation:
25% is the same as 1/4
0.25 is the same as 1/4
a.
Let
5x = number of games won
2x = number of games lost
The total number of win and lose is 154. So
5x + 2x = 154
Solving for x,
7x = 154
x = 22
Therefore, the number of games won is 5*22=110 and the number of games lost is 2*22 is 44.
b.
Let
6x = first side of the triangle
7x = second side of the triangle
9x = third side of the triangle
The perimeter of a triangle is the total of all sides. So,
6x + 7x + 9x = 88
22x = 88
x = 4
Therefore, the three lengths of the side are 6*4=24, 7*4=28, and 9*4 = 36
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