Answer:
sx-rx
Step-by-step explanation:
Since s, r, and x are unknown variables, you just multiply them. s × x = sx.
r × x = rx. then when you put the together, it will look like this:
p(80+60)=560
p(140)=560
560/140 = 4 hours
The answer is (B) 2<em>k</em><em> </em>= 18
Answer: 7 pounds
Step-by-step explanation: 1 3/4×4=7
