Answer:
-22
Step-by-step explanation:
those 2 1/5 divided by 1/10 = -22
25
138
There is 60 seconds in a minute, so if the heart beats 23 times in 10 seconds, it is 138 bpm.
23 * 6 = 138
Answer: 6
4+(x-3) = 2x-5
x+1 = 2x-5
x=6