Your Answer:
(3x2+2x-9)-(4x2-6x+3)
6x+2x-9-8x+6x-3
6x-12
6(x-2)
Please brainliest.
13 = r/9 + 8
subtract 8 from each side
5 = r/9
multiply 9 from each side
r = 45
Answer:
x = 16
Step-by-step explanation:
3x - 10 = 2(x+3)
<em>First step is solve this:</em>
<em>2(x+3) = 2*x + 2*3 = 2x + 6</em>
then:
3x - 10 = 2x + 6
3x - 2x = 6 + 10
x = 16
Check:
3*16 - 10 = 2(16+3)
48 - 10 = 2*19 = 38
You would divide 6 by 30.
6/30=0.2
Therefore the answer is D
Circumference of a white oak tree:
C = 90 in.
C = 2 r π
2 r π = 90
r · 6.28 = 90
r = 90 : 6.28
r = 14.33 in ( but it is not r in the formula )
Since the bark is 0.5 in thick: r = 14.33 - 0.5 = 13.83 in
a = r : w = 13.83 : 0.2 = 69.15 years
The widest ring is one that shows 69 years:
r = 69 · 0.2 = 13.8 in
A = r² π = 13.8² · 3.14 = 190.44 · 3.14 = 597.98 in²
Answer: The tree`s age is 69.15 years ( or 69 years and 2 months ) and the area enclosed by the outer circumference of the widest ring is 597.98 in².