C) -1/9 because any positive number times a negative number is negative
Answer:
y=3x-1
Step-by-step explanation:
3x - 6= y-5
y=3x-1
Answer:
x = 19.5 ( to the nearest tenth )
Step-by-step explanation:
Since the triangle is right, we can use the cosine ratio to find x
cos46° = =
multiply both sides by 28
x = 28 × cos46° = 19.450 ≈ 19.5
Answer:
A). 101 inches
B). 110 years
Step-by-step explanation:
Years since planting Circumference Difference
1 3 -
2 5 (5 - 3) = 2
3 7 (7 - 5) = 2
4 9 (9 - 7) = 2
5 11 (11 - 9) = 2
6 13 (13 - 11) = 2
There is a difference of 2 in every successive term of the circumference.
Therefore, the given sequence is an arithmetic sequence.
Explicit formula of an arithmetic sequence is given by,
Here a = first term
n = number of terms
d = common difference
From the given table,
Here = circumference after 'n' years
n = Age of the plant
By this formula,
Circumference of a tree after 50 years,
= 101 inches
Age of tree with the circumference = 221 inches,
221 = 2n + 1
2n = 220
n = 110 years