Answer:
354 $ is correct
Step-by-step explanation:
your v id dead
Answer: x = 35
Step-by-step explanation:
since its a 90 degree angle the equation is equal to 90
2x + 20(-20) = 90(-20)
2x/2 = 70/2
x = 35
hope this helps :))

Quadratic formula is

'a' is the coefficient of x^2 = 4
'b' is the coefficient of x = 2
'c' is the constant = -1
Now we plug in all the values in quadratic formula



The above one is the substitution of values of a,b,c in quadratic formula.
Answer:
The pulse rate is 84.54bpm
Step-by-step explanation:
Given

Required
Find
when 
Substitute 71 for x in: 



<em>The pulse rate is 84.54bpm</em>