Harry earns $300 a week plus $25 for each insurance policy he sells. 1) write an equation to determine how much harry can earn each week. 2) how many policies did harry sell last week if he earned $550? 3) identify the domain and range of the function.

1) 300 + 25x = Y

2) 10

3) X is the domain and  Y is the range

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Step-by-step explanation:

1)  300 + 25x = y

    x = # of insurance policies he sells

    y = how much he earns each week

2)  300 + 25x = 550

    25x = 250

    x = 10

3)  domain = AllRealNumbers

    range = AllRealNumbers

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step-by-step explanation:

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a