huyconlisemco

There are red, blue and yellow-coloured balls in a box. Half of the balls are red. There are 12 blue balls and three times as many yellow balls as blue balls. How many balis are there altogether?

The length of a rectangular floor is 5 m longer than its width. The area of the floor is 84 m².


Questions:
1. What expression represents the width of the floor? How about the expression that represents its length?

2. Formulate an equation relating the width, length, and the area of the floor. Explain how you arrived at the mathematical sentence.

3. How would you describe the equation that you formulated? 

4. Using the equation, how will you determine the length and width of the floor?

5. What is the width of the floor? How about its length?

6. How did you find the length and width of the floor?

Combine terms: 12a + 26b -4b – 16a.

(a) 4a + 22b,

(b) -28a + 30b,

(c) -4a + 22b,

(d) 28a + 30b

Multiply: (x – 4)(x + 5)

(a) x2 + 5x - 20,

(b) x2 - 4x - 20,

(c) x2 - x - 20,

(d) x2 + x - 20

Area and perimeter of circle