Please help I don't know the answer
1 answer:
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Answer:
- after week 7: 4374 pennies
- 486 pennies: after week 5
Step-by-step explanation:
The sequence values have a first term of 6 and a common ratio of 3, so can be described by the formula ...
an = 6·3^(n-1)
This can be rearranged to ...
an = 2·3^n
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When n=7, the value is ...
a7 = 2·3^7 = 4374 . . . . pennies saved after 7 weeks
__
To find when there are 486 pennies saved, we can solve the equation ...
486 = 2·3^n
243 = 3^n
log(243) = n·log(3) . . . . . . . take the logarithm
log(243)/log(3) = n = 5 . . . . divide by the coefficient of n
Tabitha will have saved 486 pennies after 5 weeks.
7
You have to first change the numbers so that they have common numbers then add
After that, you divide the numerator by the denominator.
Work is attached
You have to first change the numbers so that they have common numbers then add
After that, you divide the numerator by the denominator.
Work is attached
Answer:
Step-by-step explanation:
Isolate the variable by dividing each side by factors that don't contain the variable.