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3 years ago

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10 tacos and 6 drinks cost $19.50. 7 tacos and 5 drinks cost $14.25. If t is the cost of one taco and d is the cost of one drink

, which of the following systems of equations represents this situation?

1 answer:

katen-ka-za [31]3 years ago

3 0

Answer:

Step-by-step explanation:

You haven't listed any choices.

10t + 6d = 19.50

7t + 5d = 14.25

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3 years ago

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Step-by-step explanation:

Fact:

$\begin{aligned} & (a - b)\, (a + b)\\ =\; & a^{2} + a\, b - a\, b - b^{2} \\ =\; & a^{2} - b^{2} \end{aligned}$ .

In other words, $(a^{2} - b^{2})$ , the difference of two squares in the form $a^{2}$ and $b^{2}$ , could be factorized into $(a - b)\, (a + b)$ .

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