The phones at century cellphones vary in price depending upon demand. the average phone has a built in camera and costs x dollars. phones with both a camera and an mp3 player are 35 dollars less than twice the cost of the phones with just the camera. phones without any features are 100 dollars less than the cost of the phone with just the camera. purchasing all three would cost at least $525. a) determine the inequality that represents this situation. b) how much does the phone with just the camera cost?

a. let us say that:

a = cost of phones with camera

b = cost of phones with camera and mp3

c = cost of phones without any features

b = 2 a – 35

c = a – 100

a + b + c = 525

b > a > c

b. We are given three equations with three unknowns. So we can solve the problem.

a + (2 a – 35) + (a – 100) = 525

a + 2 a – 35 + a – 100 = 525

4 a – 135 = 525

4 a = 660

a = $165

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

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step-by-step explanation: