Two new DVDS, a horror film and a comedy film, are released in the same week. The weekly number N of rentals decreases for the horror film and increases for the comedy film according to the models JN = 350 - 25x IN = Horror film 30 + 15x Comedy film where x represents the time (in weeks), with x = 1 corresponding to the first week of release. (a) After how many weeks will the numbers of DVDS rented for the two films be equal? weeks (b) Use a table to solve the system of equations numerically. Compare your result with that of part (a). N = 30 + 15x Weeks, x N = 350 – 25x 1 5 7 8 9 10 The rentals are equal when x = weeks.
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
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