3 years ago

Solve the system by substitution: -4.5x-2y=-12.15 3.25x-y=-0.75

Mathematics

1 answer:

valina [46]3 years ago

4 0

Answer:

The answer is x=0.97 while y=3.90

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In the following table of values, the first differences are

ExtremeBDS [4]

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Step-by-step explanation:

Given

$\begin{array}{ccc}x & {y} & {First\ difference} & {-2} & {34} & {}&{-1} & {27} & {} &{0} & {20} & {} & {1} & {13} & {} & {2} & {6} &{} \ \end{array}$

Required

The first difference

To do this, we simply calculate the difference between the consecutive y-values.

i.e.

$d = y_{n+1} - y_n$

So, we have:

$d = y_2 - y_1 = 27 - 34 = -7$

$d = y_3 - y_2 = 20 - 27 = -7$

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