D. Choose a quantity to be represented by a variable, then write a mathematical expression for each. Do not solve. 1. Angelo’s age in 5 years 2. A three-digit number whose hundreds digit is half the tens digit and the tens digit is 2 more than the units digit 3. The total interest earned after one year when Php 100 000 is invested, part of 6% annual interest rate and the remaining part at 7.5% annual interest rate
Percentage
A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.
Algebraic Expressions
In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
Numbers
Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.
Subtraction
Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.
Addition
Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.
D. Choose a quantity to be represented by a variable, then write a mathematical expression for each. Do
not solve.
1. Angelo’s age in 5 years
2. A three-digit number whose hundreds digit is half the tens digit and the tens digit is 2 more than
the units digit
3. The total interest earned after one year when Php 100 000 is invested, part of 6% annual interest
rate and the remaining part at 7.5% annual interest rate
4. The distance travelled by a man driving at the rate of 60 kph
5. The total distance travelled by a boat 1 hour upstream and 30 minutes downstream in which the
rate of current is 3 kph
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 3/4 liter of pure water and x liters of 8% alcohol
solution
8. The age of a woman 15 years ago
9. The perimeter of a rectangle whose length is twice the width
10. The sum of three consecutive even integers
11. A three-digit number whose hundreds digit is twice the tens digit and the tens digit is 3 more that
the units digit
12. The total peso value of 20 coins consisting of P5-coins and P10-coins
13. The total distance travelled by a boat 30 minutes upstream and 25 minutes downstream in which
then rate of the current is 2 kph
14. The fraction of work done by a man who can finish a job in 3 hours and 20 minutes
15. The percentage of alcohol in a mixture formed by combining 1 liter of pure water and x liters of
40% alcohol solution
Trending now
This is a popular solution!
Step by step
Solved in 3 steps