y+2y+3z
a.2y+3z
b.3y+3z
c.2y2+3z
d.6yz
a. 2y + 3z
To simplify the expression y + 2y + 3z, you can combine like terms. Like terms have the same variables raised to the same powers.
In this case, we have two terms that contain the variable y and one term that contains the variable z.
The terms y and 2y are like terms because they both have the variable y raised to the power of 1.
To combine these two terms, we add their coefficients: 1 + 2 = 3. Therefore, y + 2y simplifies to 3y.
The term 3z does not have any other like terms, so it remains the same.
Putting it all together, the simplified expression is 3y + 3z.
Therefore, the correct option is b. 3y + 3z.
The given expression is: y + 2y + 3z.
To simplify the expression, we can add like terms together. The like terms are the terms that have the same variable(s) raised to the same power(s).
So, y + 2y is equal to 3y.
Therefore, the simplified expression is 3y + 3z.
The correct answer is b. 3y + 3z.