No, the correct identity is

. It is obtained by dividing the both sides of the Pythagorean Trigonometric Identity by cos²(x):
Generally one story in a building would be ten feet or three meters, a ten story would be 100, and a 30 story building would be 300 and so forth.
Set the number as x
x/5=1.21
Multiply by 5 on each side to cancel the 5 in the denominator.
x=6.05
Check your answer:
6.05/5=1.21
1.21=1.21
Answer:
x=13/4 or -1
Step-by-step explanation:
factorize the fraction
(4x^2+4x)(-13x-13)
4x(x+1) -13(x+1)
(4x-13)(x+1)
x=13/4 or x=1
I guess
Answer:
20
Step-by-step explanation:
15 (3/4) divided by 75% is 5 (1/4).
5 (1/4) multiplyed by 100% is 20 (4/4)