180=76+4x
180-76=4x
104=4x
104/4=x
26=x
Measurement A= 26
Answer:20cm
Step-by-step explanation:
If the blue ribbon is 9cm shorter you’re just subtracting 29-9 which is 20cm.
D) 36x^2-81
both 36x^2 and -81 are perfect squares
difference means subtraction
A hole 8 feet deep because it’s down making it negative