The height in feet of a squirrel running up and down a tree is a function of time in seconds. Here are statements describing the
1 answer:
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Answer:
S₉ = 255.5
Step-by-step explanation:
the sum to n terms of a geometric sequence is
=
where a₁ is the first term and r the common ratio
here a₁ = 0.5 and r = =
= 2 , then
S₉ =
=
= 0.5(511)
= 255.5
John and Paul want to go to the cinema, they know that the ticket costs $1 and each food box cost $3. If they spent $14, how many food boxes did each of them buy?
In this case since there is two people, we include that 2. 3x is representing the cost for buying x food boxes and 1 the cost for the ticket. 14 is the total amount of money spent.
Each of them buy 2 food boxes.