Answer:
a₄ = -9
Step-by-step explanation:
<u>Given:</u>
a₁ = 5
aₙ₊₁ = 2aₙ - 7
To calculate a₄ we would use 3 for n.
aₙ₊₁ = 2aₙ - 7
a₃₊₁ = 2a₃ - 7
a₄ = 2a₃ - 7
However we don't know a₃. Let's start from the bottom.
a₁ = 5
a₂ = a₁₊₁ = 2a₁ - 7
= 2(5) - 7
= 10 - 7
= 3
a₃ = a₂₊₁ = 2a₂ - 7
= 2(3) - 7
= 6 - 7
= -1
a₄ = a₃₊₁ = 2a₃ - 7
= 2(-1) - 7
= -2 - 7
= -9
Answer:
Step-by-step explanation:
This website may be able to help you, I used to use it back in high school! :)
https://www.symbolab.com
Answer:
C.$0.15 I TOOK IT ON STUDY ISLAND
Step-by-step explanation:
First, you want to find an exact point on the graph. What I mean by this is you want to go somewhere on the graph where the line goes through an exact y and x value.
Second, you want to figure out where this x and y value are. Where the graph first goes through two points is at (20, 3).
Third, you want to figure out what the 20 and the 3 mean. 20 is the number of messages and 3 is the dollar amount.
Finally, to calculate the amount of money per message, you divide the dollar amount (3) by the number of messages (20). So, you have 3/20. After this, simplify 3/20 to get 0.15, or 15 cents per message.
$15.75 each can costs $1.75. So 1.75x9= 15.75