The 1st, 4th, and 7th terms make an arithmetic sequence of their own. The 4th term is the average of the 1st and 7th, so ...
(1st +7th)/2 = 4th
1st + 7th = 2×4th
1st = 2×4th - 7th
The first term is ...
2*141 - 132 = 150
Answer:
x = 102
Step-by-step explanation:
The sum of all 3 angles of a triangle should equal 180 degrees, so 30+48=78 and 180-78=102.
The answer would be 7 units right!
F(x)=3(4)^x is an exponential function. Hence, this equation will increase by the exponent of x.
Let's make a table of values and look for the pattern:
x------f(x)
0 3 (zero power rule: 4^0 = 1)
1 12
2 48
3 192
So, let's look at the output values. From 3 to 12 (times 4), from 12 to 48, (times 4), from 48 to 192 (times 4).
So, the best answer is C. The number quadrupled each week.