3 years ago

Simplify the expressions. (please show work) 3. |-9| 4. -|15| 5. |14|-|-14|

Mathematics

1 answer:

Gnom [1K]3 years ago

3 0

Step-by-step explanation:

By the concept of absolute value, we have:

$| - 9| = 9 \\ \\ | - 15| = 15 \\ \\ |14| - | - 14| \\ = 14 - 14 \\ = 0$

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Usando un sistema de ecuaciones, se encuentra que

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Un sistema de ecuaciones soluciona esta pergunta.
El custo de una manzana es x.
El custo de una pera es y.

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Seis manzanas y 8 peras cuestan $26, o sea, $6x + 8y = 26$
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Primero, encontramos el cuesto de una pera, substituyendo la segunda en la primera ecuación.

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