Avideo game requires at least 4 points to advance. each solved puzzle is worth two points. each solved riddle is worth
1 point. if x is the number of solved puzzles and y is the number of solved riddles, which graph represents this scenario?
n
yt ty

2t+4

step-by-step explanation:

18

step-by-step explanation:

ik this stuph and i am smart donkey

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.

, 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