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Nezavi [6.7K]
3 years ago
5

4x+2y=0 3x-y=-10 solve the system

Mathematics
1 answer:
erik [133]3 years ago
5 0

Divide the first equation by 2:

\begin{cases}2x+y=0\\3x-y=-10\end{cases}

Sum the two equations:

5x = -10

Divide both sides by 5:

x=-2

Substitute this value for x in one of the equation (for example the first) and solve for y:

-8+2y = 0 \iff 2y=8 \iff y=4

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<em>51                                                                    320-----------------given</em>

<em>61                                                                    640------------------given</em>

<em>71                                                                    1280----------------given</em>

81                                                                   2560

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Using the given values for number of ants and the number of days, you can notice the trend for values of days and number of ants.After every ten days, number of ants doubles.Using this information, you can navigate backwards up to day 1 and forward up to day 91

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