valerieurbina valerieurbina

11-10-2021
Mathematics

contestada

Find the cost of sending 25 text messages.
Text messages- 5,6,7
Cost- 2.5,3,3.5

Respuesta :

mhanifa mhanifa

11-10-2021

Answer:

12.5

Step-by-step explanation:

This is a proportional relationship:

y = kx

Use a pair of values to find the coefficient of proportionality (5, 2.5):

2.5 = 5k
k = 2.5/5 = 0.5

k = 0.5 units represents a cost of a text message.

25 text messages cost:

25*0.5 = 12.5 units

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