The three steps are shown below were used to find an expression equivalent to 2/5( 15x- 30y)+10x

Step 1: ____
Step 2: 16x-12y
Step 3: 4( 4x-3y)
Which expression could be used as Step 1?


A. 2/5 ( 25x -30y)
B. 6x-12y+10x
C 6x-30y+10x
D. 15(x-2y) + 10x

Respuesta :

B

step 1 is to distribute the bracket by [tex]\frac{2}{5}[/tex]

= [tex]\frac{2}{5}[/tex] × 15x - [tex]\frac{2}{5}[/tex] × 30y + 10x

= 6x - 12y + 10x ← step 1