The answer of this math question is C) X= -0.2
Answer:
No, his heartbeat is 48 beats per minute (12 beats below the minimum beats per minute of a typical person's heartbeat (60 beats)).
Step-by-step explanation:
Every 10 seconds, Noah's heart beats 8 times.
Therefore, every 1 minute, his heart beats 48 times.
Noah's heartbeat is below a typical person's resting heart rate.
Answer:
1.50
Step-by-step explanation:
X = hot dog price
Y = hamburger price
5X + 4Y = 16.50
4X + 5Y = 17.25
4(5X + 4Y = 16.50)
20X + 16Y = 66
5(4X + 5y = 17.25)
20X + 25Y = 86.25
Now subtract the equations:
20X + 16Y = 66
20X + 25Y = 86.25
9Y = 20.25
Y = 2.25
Hamburger is $2.25
4X + 5(2.25) = 17.25
4X + 11.25 = 17.25
4X = 6.00
X = 1.50
Hamburgers are $2.25
Hotdogs are $1.50