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3 years ago

Help plz I don't understand

Mathematics

1 answer:

IrinaVladis [17]3 years ago

7 0

Answer:

(-9,-3.4)

Step-by-step explanation:

By adding 2.1x and subtracting 5.3 from the top equation, it will end up as 2.1x=4y-5.3

By adding 5.5y to the bottom equation, it will end up as 2.1x=5.5y-0.2.

By the equal valuesmethod, they are equal: 5.5y-0.2=4y-5.3

5.5y+5.1=4y

5.1=-1.5y

y=-3.4; this gets us our y-coordinate.

To get the x-coordinate, you plug the value for y back into the original equation.

-2.1x-4y=5.3

-2.1x-4(-3.4)=5.3

-2.1x-13.6=5.3

-2.1x=18.9

x=-9

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Answer:

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Step-by-step explanation:

1. Location:

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$\begin{array}{rcl}-50 & = & 1200 \tan \theta - 19.6\tan^{2} \theta -19.6 \\0 & = & 1200 \tan \theta - 19.6\tan^{2} \theta + 30.4\\0 & =&19.6\tan^{2} \theta - 1200 \tan \theta - 30.4\\0 & =&\tan^{2} \theta - 61.224 \tan \theta - 1.551\\\end{array}$

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Answer:

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