ꞮɴᴇQᴜᴀʟɪᴛʏ Qᴜᴇꜱᴛɪᴏɴ, ᴘʟᴇᴀꜱᴇ ʜᴇʟᴘ ᴍᴇ ᴏᴜᴛ
Juan earns $7.50 an hour working after school. He needs at least $155 to buy a stereo system. Juan's employer requires that he must work full hours; he is not permitted to work a fraction of an hour. Write and solve an inequality that describes how many hours he must work to buy the stereo system.
A. Juan must work at least 4.8 hours to buy the stereo system.
B. Juan must work at least 20 hours to buy the stereo system.
C. Juan must work 11 hours to buy the stereo system.
D. Juan must work at least 21 hours to buy the stereo system.