7a + 2b + 5a-9a-8b+ a
1 answer:
You might be interested in
Answer:
Step-by-step explanation:
To solve any equation we use PEDMAS rule(this is the sequence of priorities) where:
P: Parentheses
E: Exponent
D: Division
M: Multiplication
A: Addition
S: Subtraction
In the expression ,there is only one operation is used that is multiplication.
Choice D will create an irrational number when added. This is because a rational number plus a rational number will always be irrational (you can experiment this by trying to add rational numbers to pi). For example, 3 + pi = 6.1415926..... or 
.
:)
:)