Answer:

Step-by-step explanation:



Answer:
a
Step-by-step explanation:
they are right
12s - 20 < 50 - 3s - 25
12s - 20 < 25 - 3s
+3s. +3s
S cancels
15s - 20 < 25
+ 20. +20
15s < 45
/15. /15
S < or equal to 3
$29.40 ........ 40x0.3=12....... 40-12=28...... 28x1.05= $29.40