Choose a quantity to be represented by a variable, then write a mathematical expression for each. 1. Lota’s age in 5 years
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.
C. Choose a quantity to be represented by a variable, then write a mathematical expression for each.
1. Lota’s age in 5 years
2. a three-digit number whose hundred digits is half the tens digit and the tens digit is 2 ore than the units digit
3. the total interest earned after one year when P100, 000 is invested, part at 6% annual interest rate and the remaining part at 7.5% annual interest rate
4. the distance traveled by a man driving at the rate of 60 kph
5. the total distance traveled by a boat 1 hour upstream and 30 minutes downstream in which the rate of current is 3kph.
6. the fraction of work done by a man who can finish a job in 2 hours
7. the percentage of alcohol in a mixture of ¾ liter of pure water and x liters of 8% alcohol solution
8. the total peso value of 20 coins consisting of P5-coins and P10-coins
9. the perimeter of a rectangle whose length is twice the width
10. the sum of three consecutive even integers
Step by step
Solved in 2 steps
