Sometimes it helps to draw it out...
(17)
C_______M_________Q
|___________________|
21
therefore, CM + MQ = CQ
17 + MQ = 21
MQ = 21 - 17
MQ = 4 <===
X-7 < -3
Remember that the less than or equal to has a line underneath it!
Answer:
45min
Step-by-step explanation:
just mutiply