Answer:
Step-by-step explanation:
Let he speed of the boat on the lake is x.
<u>Considering the speed of the current it will take him:</u>
- 22.5/(x + 6) + 22.5/(x - 6) = 9
- 2.5 / (x + 6) + 2.5 / (x - 6) = 1
- 2.5(x - 6 + x + 6) = (x + 6)(x - 6)
- 2.5*2x = x² - 36
- x² - 5x - 36 = 0
- x = (5 ± √(5² + 4*36))/2 = (5 ± 13) / 2
- x = (5 + 13)/2 = 9 mph (negative root is discarded as the speed should be positive)
Answer:
The answer is 15
Step-by-step explanation:
-5 + 2(10)
-5+20
=15
Answer:
33.3
Step-by-step explanation:
The formula for area is length*width.
7.4*4.5=33.3
12 x 12 = 144
24 x 6 = 144
144 + 144 = 288 cm sqaured
Answer: it is C bro
Step-by-step explanation: cancel the common factor of four
