Answer:
One ruler cost 0.60
Step-by-step explanation:
7.50(1) + 1.80(3) + 4x = 20 - 4.70
7.50 + 5.40 + 4x = 15.30
12.90 + 4x = 15.30
4x = 2.40
x = 0.6
1)12 2)
Problem 1:
a(5)=25 a(3)=13
a(5)-a(3)=25-13=12
mark brainliest
Its B im pretty sure