3x+4y=-1
-2x-5y=10

by elimination of x or y

to find the x y=0 to find y ×=0 also for

Step-by-step explanation:

3×+4y=-1

-4y -4y

+4 and -4 equals each other out

then -1 and -4y you need to solve then whatever answer you get, you gotta multiple that by the number that can go 3 like for example if -1 minus 4y = -3 (not saying that's the answer just think about it) then how many times can -3 get into 3 and that will answer y for you

do the same for the others and you could do some research because I don't think y I can understand what I'm trying to say but hope it does help

, 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

cant

step-by-step explanation: there is no picture