Sherwin has twice as many stamps in his collection as his friends Allan and Gene combined. Allan has 55 stamps in
his collection. Sherwin has 200 stamps in his collection.
How many stamps does Gene have in his collection?
The equation 2(x+ 55) = 200 models this situation. Which choice shows the
sequence of operations needed to solve this problem, using both arithmetic
and algebra?
O A.
Arithmetic:
Algebra:
2(x +55) = 200

answer: 7270

step-by-step explanation:

whatvare the choices

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