Answer:PQ
Step-by-step explanation: __
Line up the two: BCDE
OPQR
If they are the same which is equal to the same thing?
*hint* the two middle letters.
from the given equation
X+Y=20-->i
X-Y=14--->ii
add eq i and eq ii
2x=34
x=17
putting the value of x=17 in eq i
17+y=20
then y = 3 so the right answer is
17 and 3
If 
, then we can immediately cancel the factors of 
:
Factorize the numerator and denominator:
Next, if 
, then
Answer:
186 beats per minute
Step-by-step explanation:
The maximum heart rate (r ) in beats per minute is modeled by the equation :
r = 220 - a ...(1)
Where
a is age of the person in years
If Sanchez age is, a = 34 years
Put a = 34 in equation (1)
r = 220 - 34
= 186 beats per minute
Hence, the maximum heart rate is 186 beats per minute.
