A geometric sequence is a sequence in which there is a common ratio between any two consecutive terms. In this case if X:Y:Z are in the ratio of 2:7:8 the multiplying by a constant k, we have X=2k, Y= 7k and Z=8k.
Then if X, Y-12, Z form a Geometric sequence, it means X/Y-12=Y-12/Z which is the same as 2k/7k-12=7k-12/8k if we cross multply, we get
16k²= 49k²-168k +144
33k²-168k+144 =0 solving for k
k = 4 or 1.091 if we take the whole number to find the values of X,Y and z,
X= 8, Y= 28 and Z=32
$4.5 since 1.26/7 is .14 and need 25 so it’s 4.5
Answer:
there are three significant numbers
Answer:
7.00
Step-by-step explanation:
you subtract the 2 totals.
Answer:
Step-by-step explanation:
1. 30
2. 23
3. 8
4.52
5.144
6.40
7. 210
8. 144
9. 135
10. 105
11. 2(207)
