The cost of five posters and three flags is $137.25. the cost of three posters and four flags is $122.50. what is the cost of one poster?

$16.50

Step-by-step explanation:

let cost of poster be p and cost of flag be f, then

5p + 3f = 137.25 → (1)

3p + 4f = 122.5 → (2)

Multiplying (1) by 4 and (2) by - 3 and adding will eliminate f

20p + 12f = 549 → (3)

- 9p - 12f = - 367.5 → (4)

Add (3) and (4) term by term

11p = 181.5 ( divide both sides by 11 )

p = 16.5

Thus the cost of 1 poster is $16.50

idk bring the function back   im not smart

step-by-step explanation:

x = 2

step-by-step explanation:

if sr parallel to ba then the sides bc and ac are in proportion, that is

= ← substitute values

= ( cross- multiply )

27x = 6(4x + 1)

27x = 24x + 6 ( subtract 24x from both sides )

3x = 6 ( divide both sides by 3 )

x = 2