3 years ago

How do you simplify the expression

Mathematics

2 answers:

zepelin [54]3 years ago

5 0

PEMDAS
12-14=-2
-2-5=-7
-7-9=-16
-16-4=-20
-20 is the answer

lesya692 [45]3 years ago

5 0

The answer is negative 20. Using PEMDAS.
Parenthesis, Exponents,Multiplication, Divison,Addition and Subtraction.
12-59-4

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mylen [45]

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8 0

2 years ago

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.