Sal made at least one error as he found the value of this expression.
3(-10+2[3/2(-10)]+4[1/4(20)]+5(20)
Sals steps:
step 1: 3(-10)+2(-15)+4(5)+5(20)
step 2: (3+2)(-10+-15)+(4+5)(5+20)
step 3: 5(-25)+9(25)
step 4: -125+225
step 5: 100
identify the step in which sal made his first error. After identifying the step with the first error, write the corrected steps and find the final answer
+526 First of all, I think there's a small error in the expression given,
However minute it may seem it can confuse easily... So the correction is
\(3(-10)+2[3/2(-10)]+4[1/4(20)]+5(20) \)
Now, after referring the steps we see that Sal made his first error in step 2.
∴ The correction is here as follows -
\(3(-10)+2[{3\over 2}.-10]+4[{1\over 4}.20]+5(20) = 3(-10)+2(-15)+4(5)+5(20) \)
\(=-30-30+20+100\)
\(=60\)
∴ The final answer is 60.
