English, 25.08.2019 01:50 totie7712

Plz plz me pl
each swing that susan builds requires $10 in hardware and $20 in wood. she uses the expression 10 + 20 to represent the total cost of building one swing.
which expression represents the total cost of building three swings?
a.
10 + (3 • 20)
b.
3 + (10 + 20)
c.
3 • (10 + 20)
d.
3 • 10 + 20

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each swing that susan builds requires $10 in hardware and $20 in wood. she uses...