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rd1369
24.02.2021 •
Mathematics
A blimp is flying parallel to road and is 2460 feet directly above it. The angles of depression of two parked cars on the road are 34.9° and 26.5°. To the nearest foot, how far apart are the parked cars? (Note: the blimp is above a line between the parked cars.
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Ответ:
ha fae kape kaoe lap qe us difkk
Step-by-step explanation:
Ответ:
Look at y variable and the expressions to which it is equal; substitute the easier-looking one in the more complicated.
Applying this, we get: 2x+2=x^2+3x-4
x^2+x-6=0.
Solving this equation of 2nd degree, we have a=1, b=1, c=-6 and we get Δ=25 and the solutions are -3 and 2. Hence, we get that the only possible values for x are -3 and 2.
To get the solutions, we have to also find the corresponding y-values:
For x=-3, y=2x+2=-4. For x=2, y=6.
Hence, the 2 pairs of solutions are: (-3,-4) and (2,6)