Answer:
is the answer
Step-by-step explanation:
First we need to substitute X and Y with their respective numbers

Then, following PEMDAS, We just need to simplify


Answer:
the speed of the plane was 210 mph.
Step-by-step explanation:
Answer:
The average maximum heart rate for a 20 year old is <u>200 bpm</u>
The target heart rate is <u>100-170 beats per minute (bpm).</u>
I Hope this helps and I hope everything is okay!
Ok so the average is 50
average of x number of things is
(add value of all things)/x=average
4 test scores needed
so divide by 4
3 test scores ar known
average is 50
x= missing score
(43+48+42+x)/4=50
times 4 both sides
133+x=200
minus 133 both sides
x=67
a score of 67 is needed
Decided by 12 is 2 your welcome