To eliminate the i in the denominator, you multiply it by (6+5i), because (a+b)(a-b)=a²-b², we need i² to eliminate i. Recall that i²=-1
-1(6+5i)/(6-5i)(6+5i)=(-6-5i)/[6²-(5i)²]=(-6-5i)/(36-25i²)=(-6-5i)/61
your choices are all correct. You need to check the 7th answer as well.
Answer:
Angle A = 75°
Angle B = 75°
Angle C = 30°
Explanation:
If AC is congruent to CB, from figure given we have angle A = angle B.
Angle A = 3x + 18
Angle B = 7x - 58
Angle C = 2x - 8
We have,
3x + 18 = 7x - 58
4x = 76
x = 19
So,
Angle A = 3*19 + 18 = 75°
Angle B = 7*19 - 58 = 75°
Angle C = 2*19 - 8 = 30°
Step-by-step explanation:
construct 90° then measure 4.6 cm and draw a line from F to D
Answer:
A) AB = 24 and DE = 12
Step-by-step explanation:
Since the side CA is the double of side DF and the side CB is double the side FE, to get SIMILAR triangles, we also need the third sides to in the same proportion... so AB = 24 and DE = 12
So the first triangle would have measurements:
CA = 12
CB = 20
AB = 24
The second triangle would be scaled by 2:
DF = 6
FE = 10
DE = 12
Answer:
12
Step-by-step explanation:
a = 2
b = 3
c = 9
a(c - b)
2(9 - 3)
2(6)
12