Answer:
a=-20
Step-by-step explanation:
-4(7a+5)=-160
7a+(-20)=-160 Multiply -4 and 5
7a=-140 Subtract -20 from -160
a=-20 Divide 7 by -140
Answer:
What ?
Step-by-step explanation:
Answer: (-1, 10)
Step-by-step explanation:
Answer: The actual distance is 68 miles.
Step-by-step explanation:
Answer:
4
Step-by-step explanation:
Using the rule of radicals
×
⇔ 
Given

= 
=
× 
= 2