Bob bought 5 books for x dollars each and a DVD for $12. Write an expression for how much money Bob spent.

5x+12=y

Step-by-step explanation:

Y represents the amount of money spent.

if x represents the amount of one book and Bob bought 5 books than you have to multiply the amount of one book by five to get the amount spent on all the books. Thus getting 5x

You need an equation to find how much money spent total. Thus adding $12 because Bob also bought a DVD for $12.

Therefore, the only logical equation is 5x+12=y

, 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

0.32

step-by-step explanation:

2.24/7