Answer:
distance covered in 2 hours = 80 km
distance covered in 1 hour = 80÷2 = 40 km
distance covered in 7/2 hours = 40 × 7/2
= 140 km
(3 1/2hours = 7/2 hours)
Answer:
$147
Step-by-step explanation:
0.15x = $22.05
Divide both sides by 15
22.05/0.15 = $147
Answer:
17.32 + 10i
Step-by-step explanation:
The product of the complex numbers;
z, = 5( cos 20° + i sin 20°)
za = 4( cos 10° + i sin 10°)
5( cos 20° + i sin 20°) × 4( cos 10° + i sin 10°)
= 20(cos20(cos10) + i sin20(cos10) + i sin10(cos20) + isin20(i sin10))
= 20(cos20(cos10) + i sin20(cos10) + i sin10(cos20) + sin20(sin10)i^2 )
And i^2 = -1
= 20(cos20(cos10) + i sin20(cos10) + i sin10(cos20) - sin20(sin10) )
= 20(cos20(cos10) - sin20(sin10) + i(sin20(cos10) + sin10(cos20)))
= 20(0.866 + i(0.5))
= 17.32 + 10i
Answer:
the third one
Step-by-step explanation:
all you have to do is multiply the exponents
8x-6x=280 if this is not the answer tell me what I hate to do
