Answer:
2x-y=2
Step-by-step explanation:
sub the numbers in for your variables
2(3)-2=
6-2= 4
Answer:
<h2>17</h2>
Step-by-step explanation:
Use PEMDAS:
P Parentheses first
E Exponents (ie Powers and Square Roots, etc.)
MD Multiplication and Division (left-to-right)
AS Addition and Subtraction (left-to-right)

1235 / 100
See 1235 as 1235.0, since we are dividing by 100, we have two zeros, so we move the decimal point in 1235.0 two places to the left.
12.35
Not necessarily. You could have done your multiplication wrong. Or in some cases, yes, you could have to use another skill. For example, you can't solve an optimization problem with addition, you need some calculus skills under your belt.