Tommy posts 11 pictures on instagram every day. elizabeth posts 15 pictures on instagram every day.
part a: define each variable and write an algebraic expression to describe the combined number of posts for tommy and elizabeth after any given number of days.
part but: after 7 days how many pictures have tommy and elizabeth posted altogether? how do you know?

Part A: The expression for the combined posts is d (t + e)

Part B: Tommy and Elizabeth have posted 182 pictures altogether

Step-by-step explanation:

* Lets explain how to solve the problem

- Tommy posts 11 pictures on Instagram every day

∴ The rat of Tommy is 11 pictures per day

- Elizabeth posts 15 pictures on Instagram every day

∴ The rat of Elizabeth is 15 pictures per day

# Part A:

- To make an Algebraic expression to describe the combined

  number of posts for Tommy and Elizabeth after any given number

  of days, chose a variable represents the number of days

- Assume that the number of days that Tommy and Elizabeth post

 is d days and the rat of Tommy is t pictures per day , the rate of

 Elizabeth is e pictures per day

∵ The rat of Tommy is t pictures per day

∵ The rate of Elizabeth is e pictures per day

∵ They do that for d days

∴ Their combined number of posts = t d + e d

- Take d as a common factor from both terms

∴ Their combined number of posts = d (t + e)

* The expression for the combined posts is d (t + e)

# Part B:

∵ d = 7 , t = 11 , e = 15

∵ Their combined number of posts = d (t + e)

- Substitute the value of the variables in the expression

∴ Their combined number of posts = 7 (11 + 15)

∴ Their combined number of posts = 7 (26)

∴ Their combined number of posts = 182

* Tommy and Elizabeth have posted 182 pictures altogether

the answer is 4.8 units on e2020.

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step-by-step explanation: