18/30 = $0.6 per message
0.6 * 12 = 7.2
Solution: $7.20 for 12 messages
Rectangle RSTU
P = 2(9+6) = 2 (15) = 30
R'S'T'U' scale 1/3 to
P of R'S'T'U' = 30/3 = 10
answer.
4. 10 units
The simplified equation of
is 
<h3>How to determine the simplified equation?</h3>
The complete question is added as an attachment
The equation is given as

Subtract (x - 10)^2 from both sides

Evaluate 4^2

Take the square root of both sides

Add 6 to both sides

Hence, the simplified equation of
is 
Read more about simplified equation at:
brainly.com/question/723406
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Their daily rate is

miles per day
Using distance-speed-time formula, we can calculate the time

days
They need 21-3=18 more days to finish the trip
Answer:
0
Step-by-step explanation: