Answer:
2/3
Step-by-step explanation:
20% = 12
48
1/6 = 8
left = 40
40/60 = 4/6
4/6 = 2/3
To solve the equation using complete square method we proceed:
z^2-19z=66
but
c=(-b/2a)^2
c=(-19/2)^2
c=361/4
thus:
z^2-19z+361/4=66+361/4
factoring the LHS we get:
1/4(2z-19)^2=625/4
(2z-19)^2=625
getting the square root of both sides we get:
2z-19=+/-25
2z=+/-25+19
2z=44 or -6
z=22 or -3
Answer: z=22 or z=-3
Answer:
Equivalent
Step-by-step explanation:
4:5 multiply both sides by 4 to get 16:20
Answer:
128
Step-by-step explanation:
