Anewspaper sells both paper and digital subscriptions. the newspaper reports that 1,800 total subscriptions were sold last month and the total revenue from those subscription sales was $20,760. the digital subscriptions, d, cost $8 a month, and the paper subscriptions, p, cost $20 a month. which of the following systems of equations could be used to solve for the number of each type of subscription that was sold by the newspaper last month?

the answer is 8/21

hope this

7.9m and 4.3°

step-by-step explanation:

let east be +x and north be +y, x = distance * cos θ, y = distance * sin θ  

for 3.5 south, y = -3.5  

for 8.2, x = 8.2 * cos 30 and y = 8.2 * sin 30  

for 15 west, x = -15  

total x = 8.2 * cos 30 – 15 ≈ -7.9  

total y = -3.5 + 8.2 * sin 30 = 0.6  

magnitude = [(8.2 * cos 30 – 15)^2 + 0.6^2)]^0.5  

the magnitude is approximately 7.9 m  

tan θ = y/x = 0.6/-7.9  

the angle is approximately 4.3˚ north of west

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