Find the geometric mean of the two numbers.6 and 20 Complete the sentence.
х 7 3 ?
10. If
3 9
=
-, then
x ?
?
11. If
y
8 12
х
then
==
II
Y ?
х
X+4
? ?
12. If -=
X-Y
7
then
=
4
?
13. Given BCDE ~ ACDF, find BA
с
7
B
В.
5
E
8
A
F

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step-by-step explanation:

d = distance between moon and sun, which in this problem is the hypotenuse of a right triangle.  

the distance y is the side opposite to angle x in the right triangle.   use the definition of the sine function from basic trigonometry.

sin(x) = y/d ⇒

d = y/sin(x)

step-by-step explanation:

you divide the denominator by the numerator on both sides and if the quotients are equal then the fractions are equivalent

step-by-step explanation:

the terms of a geometric sequence can be found by beginning with the first term and multiplying by the common ratio repeatedly. a recursive formula for a geometric sequence with common ratio r is given by an=ran−1 a n = r a n − 1 for n≥2 n ≥ 2 .

step-by-step explanation: