) The 8th grade t-shirt sells for $12 and costs $9.45 to make. The school sells 215 of them to their 8th graders. If they allocate 85% of the profits to the 8th
grade dance. Which expression could be used to calculate the amount of
money they raised for the dance?
a.) 215(12 - 9.45)(0.85)
b.) 215(12)(85)
c.) 215(12-9.45)(.15)
d.) 215(12 - 9.45)(85)
e.) 215(12) - (9.45)(.85)

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for

a sample of water is taken and kept in a beaker in a freezer at a constant temperature of 0°c. if the system is at dynamic equilibrium, which of these statements is true?