3 CD → $29.98
29.98 - 6.44 = 23.54 → remained
If each CD costs the same amount ... ↓
23.54 ÷ 3 = 7.8466
$7.8466
Answer:
Step-by-step explanation:
- 1/4(x - 2/3) =
- 1/4x - 1/4(2/3) =
- 1/4x - 1/6
Correct choice is A
The answer is C.
Point G can be centroid because 12:6 equals 2:1
FG = 6
FC = 18
so
GC = 12
12:6 = 2:1
A₆ =12
a₇ = ?? = x
a₈ 27
In this case x is the geometric mean & as per the formula
geometric mean of 2 numbers =√(a₆ * a₈) = √(12*27)
& x=18.
Proof:
Find the common ratio between a₇ & a₆ ==> = ( x) / 12
now find the common ration between a₈ & a₇ ===> =27 / (x)
x/12 = 27/x ===> x² = 12*27 ==> x² = 324 & x =√324 = 18
