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.
C. x = a number will always a be a horizontal line
I'm assuming that the first word is "four", with that said, this equation is quite simple. All you need to do to find the price per gallon is divide the cost of four gallons by four.
16.80 ÷ 4 = $4.20
You divide it by 7 to get 4. Or subtract to get 21
Answer:
30 weeks
Step-by-step explanation:
for this equation a will be the number of weeks
you have, 60 + 7a
she has, 120 + 5a
60+7a = 120 + 5a
2a = 60
a = 30 weeks
I hope that makes sense and helps you!!