Step-by-step explanation:
8 battery =12
20 battery =?(x)
8x=240
x=240÷8
x=30
for 20 battery..it would cost 30
Answer:

Step-by-step explanation:

1.) 40, 2.) 8, 3.) 18, 4.) 15, 8.) 12, 9.) 30, 10.) 72, 11.) 36
If the question is supposed to be

Now multiply both sides by 3 to get 3(-21)=-63=e
Answer: 7.08 cm2
Step-by-step explanation: