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Questions and Answers
What is the sum of 56 and 78?
What is the sum of 56 and 78?
- 136
- 132
- 138
- 134 (correct)
What is the value of 'x' in the equation 3x - 7 = 20?
What is the value of 'x' in the equation 3x - 7 = 20?
- 12
- 11 (correct)
- 10
- 9
What is the area of a rectangle with length 12 cm and width 8 cm?
What is the area of a rectangle with length 12 cm and width 8 cm?
- 80 sq cm
- 96 sq cm (correct)
- 72 sq cm
- 100 sq cm
Flashcards
56 + 78 = ?
56 + 78 = ?
The sum of 56 and 78 is 134.
Value of 'x' in 3x - 7 = 20
Value of 'x' in 3x - 7 = 20
In the equation 3x - 7 = 20, the value of 'x' is 11.
Area of rectangle (12 cm x 8 cm)
Area of rectangle (12 cm x 8 cm)
The area of a rectangle with length 12 cm and width 8 cm is 96 sq cm.
Study Notes
Math Basics
- The sum of 56 and 78 is 134.
Algebra
- To solve for 'x' in the equation 3x - 7 = 20, add 7 to both sides to get 3x = 27, then divide both sides by 3 to get x = 9.
Geometry
- The area of a rectangle is found by multiplying its length by its width, so the area of a rectangle with a length of 12 cm and a width of 8 cm is 12 x 8 = 96 square cm.
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