1) Doctors have two methods of calculating maximum heart rate. With the first method, maximum heart rate, y, in beats per minute
is y=220 - X, where x is the person's age. Maximum heart rate
with the second method is shown in the table. (Example 1)
Age, x
Heart rate (bpm), y
20
194
30
187
40
180
50
173
60
166
Hint: y = 220 - x is like writing y = -x + 220
a) which method gives a greater maximum heart rate for a 70 year old?
b) Are heart rate and age proportional or non proportional for each method?
2)

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles

step-by-step explanation:

4227473658779875563886538705958641728563470543621287463824132573847969p05749365273847906970680574936214

m∠cdf = 43° , m∠gdf = 114°, m∠gde = 23°, m∠edh = 23° , m∠cdh = 157°

step-by-step explanation:

since, it is given that de bisects the angle gdh ⇒ de divides the angle gdh into two equal angles.

⇒ m∠gde = m∠edh

⇒ 8·x   - 1 = 6·x + 5

⇒ x = 3

so, m∠gde = 8·x - 1 = 23°

and m∠edh = 23°

now, it is given ∠cde is an straight angle so, m∠cde = 180°

⇒ m∠cdf + m∠fdg + m∠gde = 180°

⇒ 43° + m∠fdg + 23° = 180°

⇒ m∠fdg = 114°

again, m∠cde = m∠cdh + m∠edh = 180°

m∠cdh + 23° = 180°

⇒ m∠cdh = 157°

well we know there are 4 clubs in 52 cards so it’s replaced so it should be 3/51

step-by-step explanation: