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- 3y²
- 9y⁴
- y²
- None of these
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Explanation
To divide the expression, follow the quotient rule:
9y⁴ ÷ 3y² = (9/3) × (y⁴/y²)
Simplify:
3 × y²
So, the correct answer is:
3y²
- 784
- 540
- 15628
- None of these
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Explanation
A perfect square is a number that can be expressed as the square of an integer.
784 = 28 × 28, making it a perfect square.
- ∅
- U - A
- U - B
- None of these
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Explanation
- U′ (U complement) represents the elements not in .
- Since is the universal set, its complement is an empty set (∅).
- LCM
- Multiple
- Factor
- None of these
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Explanation
A factor of a number is a value that divides it completely without leaving any remainder.
For example, 3 is a factor of 12 because 12 ÷ 3 = 4 with no remainder.
- 2.1
- 3.1
- 2.5
- None of these
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Explanation
To evaluate the expression, follow the order of operations (PEMDAS):
1. Evaluate the innermost parentheses:
1.4 - 0.5 = 0.9
So, the expression becomes:
1.5 + (0.7 + 0.9)
2. Evaluate the next set of parentheses:
0.7 + 0.9 = 1.6
Now, the expression becomes:
1.5 + 1.6
3. Finally, add the numbers:
1.5 + 1.6 = 3.1
- 4
- 3
- 5
- None of these
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Explanation
To find out how many pieces of 4/10 meters can be cut from a wire 8/5 meters long:
First, convert both lengths to decimal:
4/10 = 0.4 meters
8/5 = 1.6 meters
Now, divide the total length by the length of each piece:
1.6 ÷ 0.4 = 4
- 3080
- 2560
- 1980
- 1240
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Explanation
10 × 4 = 40
40 × 4 = 160
160 × 4 = 640
640 × 4 = 2560
- 10
- 1
- 1000
- 1111
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Explanation
The smallest 6-digit number is 100000.The greatest 5-digit number is 99999.
Their difference: 100000 - 99999 = 1.
- (2,-3)
- (2,3)
- (-2,3)
- None of these
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Explanation
Reflection over the x-axis changes the y-coordinate's sign while keeping the x-coordinate the same.
Given point (2, -3), after reflection, it becomes (2, 3).
- 2
- 3
- -3
- None of these
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Explanation
