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anonymous
 one year ago
PreCal
anonymous
 one year ago
PreCal

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welshfella
 one year ago
Best ResponseYou've already chosen the best response.2the coefficient of x will be negative for a parabola that opens downwards the function x^2 is this shape with the vertex at the origin (0,0) But we want to move this up to (0,36) by adding 36 so our equation would be x^2 + 36

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Thanks! what about this part? Create a table of values for a linear function. A drone is in the distance, flying upward in a straight line. It intersects the rainbow at two points. Choose the points where your drone intersects the parabola and create a table of at least four values for the function. Remember to include the two points of intersection in your table.

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2well we can choose one value that's on the yaxis say (0,20) for example. Then one value on left side of our rainbow say x = 5 and y will then be (5^2) + 36 = 11

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2we can then work out the equation of the line and find the point where it intersects another point on the curve and another point before or after the intersections

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Don't we need to create a table w/ 2 intersection points too?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2slope of line is (2011)/ 0(5) = 9/5

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2yes we have one already and we can find the other by solving the 2 equations. the line cuts the axis at y=20 so its equation is y = (9/5) x + 20

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0How would we do that? Just plug in points?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2so another point could be at x = 7 and y= (9/5)*7 + 20

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2to find the second point of intersection we need to solv (9/5)x + 20 = x^2 + 36

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0would we subtract 20 from both sides?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2its a quadratic so add x^2 to both sides and subtract 36 from both sides

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2x^2 + (9/5)x  16 = 0

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2use the quadratic formula

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Ok! But wouldn't the solution be complex making it no real solution?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2no one solution will be negative though which you can ignore

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2the solution will be close to 3 so that will give you your 4 points
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