Answer:
$200
Step-by-step explanation:
70 x 2 = 140.00 + 60.00 = $200
Add 29 and 18 first to get to get 47 then add 47 and 21 to get your final answer that is 68
I actually posted this a while ago and it got answerd by a smart person so here's what I understood
the error is that it assumes that √(x²)=x
because if x is negative, it becomes positive
that's how the 2nd line is wrong
the 2nd line is the first wrong step
it goes from 4-9/2+9/2
so it goes from 4-4.5+4.5
notice the part under the parenthsees
√((4-4.5)²)
if we evaluate 4-4.5, we get -0.5
but by squaring it we get 0.5
-0.5+4.5=4, yes
but when we square it we get
0.5+4.5=5, that is how it works
The correct answer is the 5th option (one before the last one).
Answer:
the variable is "b"
Step-by-step explanation:
