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Vilka [71]
3 years ago
13

(2n-9)-5(-2.4n+4) please help!

Mathematics
2 answers:
MA_775_DIABLO [31]3 years ago
7 0

(2n - 9) - 5(-2.4n + 4)    use distributive property

= 2n - 9 + (-5)(-2.4n) + (-5)(4) = 2n - 9 + 12n - 20   combine like terms

= (2n + 12n) + (-9 - 20) = 14n - 29

Reika [66]3 years ago
3 0

Hello!

Explanation:

↓↓↓↓↓↓↓↓↓↓↓

(2n-9)-5(-2.4n+4)

First, remove parenthesis.

2n-9-5(-2.4n+4)\\

Secondly, expand.

-5(-2.4n+4):12n-20

Third, apply the distributive law.

a=-5, b=-2.4n, c=4

=-5(-2.4n)+(-5)*4

Then, apply minus-plus rules.

5*2.4n-5*4

Simplify.

5*2.4n-5*4:12n-20

Multiply by the numbers.

5*2.4=12

12n-5*4

Again, multiply by the numbers.

5*4=20

12n-20

=2n-9+12n-20

Simplify.

2n-9+12n-20:14n-29

Group like terms.

↓↓↓↓↓↓↓↓↓↓↓

=2n+12n-9-20

Add similar elements.

2n+12n=14n

=14n-9-20

Subtract by the numbers.

-9-20=-29

=14n-29

Answer⇒⇒⇒=14n-29

Hope this helps!

Thank you for posting your question at here on Brainly.

-Charlie

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