Solve for x.
-2x - 1 + 3x = 7

8

Step-by-step explanation:

Combine the X's to become 1x and then add one to both sides. Also there is this site called . Its a calc. U can use that instead of for the answers. Saves u points.

8

Step-by-step explanation:

answer: a clock

step-by-step explanation:

, 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