We have a15 = a1 + 14 x r and a21 = a1 + 20 x r <=> 29 = a1 + 14 x r and 47 = a1 + 20 x r;
Then, 47 - 29 = (20 x r + a1) - (14 x r + a1);
18 = 6 x r;
r = 3;
We have 29 = a1 + 42;
a1 = 29 - 42;
a1 = - 13;
Finally, a5 = a1 + 4 x r = -13 + 4 x 3 = -13 + 12 = -1.
They want to make a total of $1200.
55*10=550
55*8=440
440-550=990
1200-990=210
210/35=6
So they should sell the other plants for $6 each.
Answer: D
Step-by-step explanation:
It is the only graph with 3 on 40-49.
<em>Hope it helps <3</em>
They travel 15+12, or 27 feet towards each other every second. 54/27 is 2.
Answer: 2 seconds
