3 years ago

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

Mathematics

2 answers:

ryzh [129]3 years ago

5 0

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

Marina86 [1]3 years ago

4 0

Answer:

12.5 is the answer :D

Step-by-step explanation:

Please give me brainliest :D

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