Answer: b. 8
Step-by-step explanation: I don’t have work
2/3 + (-1/3) = 2/3 - 1/3 = 1/3
The ratio of 2/3 to 3/8 is...
(2/3) / (3/8) = (2 x 8) / (3 x 3) = 16/9
A) 14:27
B)139 minutes
C) No she’s not back on time she will be back on 16:09 she is 4 minutes late because 14:19 + 1:50 = 16:09
Hope it’s right
Best luck with your studying
Answer:
u = x²
Step-by-step explanation:
4x⁴ − 21x² + 20 = 0
Substitute u = x² to turn the equation into a quadratic.
4u² − 21u + 20 = 0
You can solve by factoring.
(4u − 5) (u − 4) = 0
u = 5/4 or 4
x² = 5/4 or 4
x = ±½√5 or ±2