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saul85 [17]
2 years ago
15

Tommy posts 11 pictures on Instagram every day . Elizabeth posts 15 pictures on Instagram every day .

Mathematics
2 answers:
sleet_krkn [62]2 years ago
7 0
You can just think of any variable for example let's use "T" , "E". Then do T +E for part a. Then do T=11 E=15. After do 11 •7 and 15•7. 11•7=77 . 15•7=105. Last do 105+77 and it equals 182.
mariarad [96]2 years ago
4 0

Let's define the following equations:


PART A


A.1 Defining variables


x: Any given number of days

T: Number of posts of Tommy after any given number of days

E: Number of posts of Elizabeth after any given number of days

P: Total numbers of posts


A.2 Writing an algebraic expression

By writing an algebraic expression to describe the combined number of posts for Tommy and Elizabeth after any given number of days we have:


<u>For Tommy:</u>

T = 11x


<u>For Elizabeth :</u>

T = 15x


So, the algebraic expression that combines the number of posts for Tommy and Elizabeth after any given number of days is:


P = 11x + 15x

∴ P =26x


PART B


B.1 Pictures of Tommy and Elizabeth after 7 days


This can be found using the expression:

P =26x

So, since x = 7, the total numbers of posts of Tommy and Elizabeth is:

P = 26(7)

∴ P = 182 posts on Instagram


B2. How do we know this?

It's simple, we have said that x represents any given number of days. So, the number of days is the same for everyone. Therefore, this can be demonstrated as follows:


<u>For Tommy:</u>

T = 11x

T = 11(7) = 77 posts

<u>For Elizabeth:</u>

E = 15x

E = 15(7) = 105 posts


Finally:

T + E = 77 + 105

T + E = 182 posts

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