write the expression in expand form
(4.2z)(-5y-3)
(4.2z)(-5y-3)
(4.2z)(-5y)+(4.2z)(-3)
-21.0yz - 12.6z
-32(15x+4y-9)
To expand the expression (4.2z)(-5y-3), you can use the distributive property. This property states that when you multiply a number or expression by a sum or difference, you can distribute the multiplication to each term inside the parentheses. Here's how you can apply the distributive property to expand the given expression:
Step 1: Distribute 4.2z to each term inside the parentheses (-5y - 3):
(4.2z)(-5y) + (4.2z)(-3)
Step 2: Multiply the coefficients (4.2z) with each term inside the parentheses:
-21zy - 12.6z
So, the expanded form of the expression (4.2z)(-5y-3) is -21zy - 12.6z.