Answer:
Factoring.
General Formulas and Concepts:
<u>Algebra I</u>
- Factoring
- Finding roots of quadratics
Step-by-step explanation:
<u>Step 1: Define</u>
y = 2x² - 6x - 8
0 = 2x² - 6x - 8
<u>Step 2: Find roots</u>
- Factor 2: 0 = 2(x² - 3x - 4)
- Factor: 0 = 2(x - 4)(x + 1)
- Find roots: x = -1, 4
And we have our final answer!
Answer:
Speed of boat in still water is 26km/hr
Step-by-step explanation:
Let the speed of boat in still water be x and speed of stream by y.
Speed at which it went upstream would be (x-y) and the speed at which it went downstream would be (x+y). According to question x+y=24 and x-y=28. x=26 and y=-2.
The line will flip across the y-axis.
Cross multiply.
Note:
Cross multiplying we get:
I hope that helps :)
That would be 57%
Kiko Cordeiro