3 years ago

Identify each as an expression or an equation 8x-3

1 answer:

8 0

An equation has an equal sign, whereas an expression does not have an equal sign. 8x-3 is an expression. If it was 8x-3 = then it would be an equation. (you can remember this by <u>equa</u>tion and <u>equal</u> sign.

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Step-by-step explanation:

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Evaluate the expression when a= 4, b= - 2, and c= 7 - -> 5a - 9 (b - c)

ollegr [7]

Answer:

$65$

Step-by-step explanation:

Given the following question:

$5a-9(b-c)$
a = 4
b = 2
c = 7

In order to find the answer, we need to substitute the variables with the numbers given, and then solve using PEMDAS.

$5\times4-9\times(2-7)$
$2-7=-5$
$5\times4-9\times-5$
$5\times4=20$
$20-9\times-5$
$9\times-5=-45$
$20--45$
$20+45=65$
$=65$

Hope this helps.