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Dmitry [639]
3 years ago
7

I need to know how to write a proof for why CF is the perpendicular bisector of BD

Mathematics
1 answer:
Soloha48 [4]3 years ago
3 0
It creates a 90 degree angle so that means its perpendicular. 
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Three numbers X, Y, and Z are in the ratio 2:7:8. If 12 is subtracted from Y, then three numbers form a geometric sequence (in t
Dimas [21]
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 
3 0
3 years ago
I need help -6x > 30
Debora [2.8K]

Answer:

×< -5

Step-by-step explanation:

-6x>30 reverse the sign

x< -5

7 0
2 years ago
Hamburger: $6.00<br> Fries: $2.00<br> Tax: 7%<br> Tip: 20%<br><br> Total: ___
Salsk061 [2.6K]

Answer:

$10.27

Step-by-step explanation:

H + F = $8, (7% of 8 is 0.56) [$8.56] + 20% = 10.272 --> $10.27

3 0
3 years ago
Help me? ill give 10 points.
Svetradugi [14.3K]

Answer:

Step-by-step explanation:

6.50$

5 0
3 years ago
Read 2 more answers
If Lauren robed (22+34) bread from the bread factory how much bread would she have.
Igoryamba

Answer:

22 + 34 = 56

Step-by-step explanation:

um you just add

3 0
3 years ago
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