Sam needs a web designer .designer a is offering her services for an initial 500 in addition to 100 per hour. designer b is offering her services for an initial 600 in addition to 50 per hour. when will the two designers charge the same amount of energy?

Step-by-step explanation:

Using the problem values, we can find an expression to each designer cost, and then solve the system.

Designer A:

Designer B:

The amount that has to be with the variable is the fee per hour, because we don't know the number of hours. Now, we solve this system to find the common point, we equalize both equations, because the problem is asking for the moment when the charge the same price :

This means that they will charge the same cost after 2 hours.

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

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