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olga2289 [7]
3 years ago
14

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?
Mathematics
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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We know that the value of n will be negative.

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Factorise 9w² - 100<br><br><br>​
ohaa [14]

Answer:

9\, w^{2} - 100 = (3\, w - 10) \, (3\, w + 10).

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).

In this question, the expression (9\, w^{2} - 100) is the difference between two terms: 9\, w^{2} and 100.

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Hence:

9\, w^{2} - 100 = (3\, w)^{2} - (10)^{2}.

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\begin{aligned}& 9\, w^{2} - 100 \\ =\; & (3\, w)^{2} - (10)^{2} \\ = \; & (3\, w - 10)\, (3\, w + 10)\end{aligned}.

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It’s BD because it need to be the opposite ray and this one is the opposite ray so yes this is it
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