Answer:
138
Step-by-step explanation:
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: 4/15
Step-by-step explanation:
1. Change 1/3 to 4/3 by multiplying the numerator by 3 and adding one.
2. Multiple 4/3 by 1/5 to get 4/15.
Suppose there are 19x students, 1x teachers
19x+1x=400
20x=400
x=20
there are 20 teachers and 380 students.
Answer:
4
Step-by-step explanation:
5^2-3^2=16
sqrt16=4