Shau-uen solve the equation 18.5w+6.5w-2.8w=149.1 her work is shown below step(1) 18.5w+6.5w-2.8w= 149.10 step(2) 25w-2.8w= 149.1 step(3) -2.8w=5.964 step(4) w= -2.13 in which step did shaun make her first error? a. step 1 b. step 2 c. step 3 d. step 4

Shaun make her first error in step 3. Answer C

Step-by-step explanation:

If have the same units you can simply add them, Like this:

Step (1)

18.5w+6.5w-2.8w= 149.10 (everything in the left side is in terms of w)

Step(2)  

25w-2.8w= 149.1 (add 18.5+6.5)

Step(3)

Here you have to add the terms of w

(25-2.8)w=149.1

22.2w=149.1

Step(4)

Here you  clear w

w=149.1/22.2

w=6.72

sss (side, side, side)

sas (side, angle, side)

asa (angle, side, angle)

aas (angle, angle, side)

hl (hypotenuse, leg)

answer: ♡♡♡♡♡♡♡♡♡♡

step-by-step explanation: