Question

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

Answer 1

(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

Answer 2

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!

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-Charlie