Answer:
4.5
Step-by-step explanation:
The answer should be the 1st one.
Just use the quadratic formula and plug in the necessary numbers when requested and work from there.
Answer:

Step-by-step explanation:
If it is on sane for 25% off, that's the same as being on sale for 75% of the original price.
Multiply the original cost by 75% in decimal form.
30*.75=22.5
Final answer: $22.50