Mathematics Competition For Grade Nine

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  • 1/24 Questions
    If a = 3 and b = 4, then h =  - ProProfs

    If a = 3 and b = 4, then h = 

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About This Quiz

This Mathematics Competition for Grade Nine tests students on key geometry concepts. It includes finding midpoints, distances, and endpoints between coordinates, enhancing spatial reasoning and analytical skills.

Mathematics Competition For Grade Nine - Quiz

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  • 2. 
    If a = 5, b = 12, then h =  - ProProfs

    If a = 5, b = 12, then h = 

    Explanation
    In this question, the values of a and b are given as 5 and 12 respectively. The variable h is not explicitly defined in the question, but based on the given values, it can be inferred that h represents the hypotenuse of a right-angled triangle. According to the Pythagorean theorem, the square of the hypotenuse is equal to the sum of the squares of the other two sides. Therefore, using the values of a and b, we can calculate the value of h as the square root of (5^2 + 12^2), which is equal to 13.

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  • 3. 

    What is the y-intercept in the following equation:y = -3x + 2

    Explanation
    The y-intercept in the equation y = -3x + 2 is the point where the line crosses the y-axis. In this equation, the y-intercept is the value of y when x is equal to 0. By substituting x = 0 into the equation, we get y = -3(0) + 2, which simplifies to y = 2. Therefore, the y-intercept is 2.

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  • 4. 

    What is the y-intercept in the following equation:y = -5x - 7

    Explanation
    The y-intercept is the point where the graph of the equation intersects the y-axis. In the given equation y = -5x - 7, the constant term -7 represents the y-intercept. This means that when x = 0, y will be -7. Therefore, the y-intercept is (-7, -7).

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  • 5. 

    What is the y-intercept in the following equation:y = -47x + 47

    Explanation
    The y-intercept in the given equation is 47. This means that the line crosses the y-axis at the point (0, 47). The equation y = -47x + 47 represents a line with a slope of -47 and a y-intercept of 47. The positive sign indicates that the line crosses the y-axis above the origin.

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  • 6. 

    Identify the slope of the line. y = 3x - 5

    Explanation
    The slope of the line can be determined by looking at the coefficient of the x term in the equation. In this case, the coefficient of x is 3, which means that the slope of the line is 3.

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  • 7. 

    Identify the y-intercept of the equation. y = 2/9 x?

    Explanation
    The y-intercept of an equation is the value of y when x is equal to 0. In this equation, when x is 0, the value of y is also 0. Therefore, the y-intercept of the equation y = (2/9)x is 0.

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  • 8. 

    Find the distance between (2,2) and (6,2).أوجد المسافة بين النقطتين

    Explanation
    The distance between two points in a coordinate plane can be found using the distance formula, which is derived from the Pythagorean theorem. In this case, the two points (2,2) and (6,2) have the same y-coordinate, indicating that they lie on the same horizontal line. Since they have different x-coordinates, the distance between them can be calculated as the absolute difference between their x-coordinates, which is 4. Hence, the distance between the two points is 4.

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  • 9. 

    Find the distance between (-1,3) and (2,-1).احسب طول  المسافة بين النقطتين

    Explanation
    The distance between two points in a coordinate plane can be found using the distance formula, which is derived from the Pythagorean theorem. The formula is d = sqrt((x2 - x1)^2 + (y2 - y1)^2), where (x1, y1) and (x2, y2) are the coordinates of the two points. In this case, the coordinates are (-1, 3) and (2, -1). Plugging these values into the formula, we get d = sqrt((2 - (-1))^2 + (-1 - 3)^2) = sqrt(3^2 + (-4)^2) = sqrt(9 + 16) = sqrt(25) = 5. Therefore, the distance between the two points is 5 units.

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  • 10. 

    Find the distance between (-6,-3) and (6,6).احسب طول المسافة بين النقطتين

    Explanation
    The distance between two points in a coordinate plane can be found using the distance formula, which is derived from the Pythagorean theorem. In this case, the distance between (-6,-3) and (6,6) can be calculated as follows:

    d = √[(x2 - x1)^2 + (y2 - y1)^2]
    = √[(6 - (-6))^2 + (6 - (-3))^2]
    = √[12^2 + 9^2]
    = √[144 + 81]
    = √225
    = 15

    Therefore, the distance between the two points is 15 units.

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  • 11. 

    Is this the Pythagoras Theorem: a2 + b2 = c2هل هذة نظرية فيثاغورث 

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The given equation, a2 + b2 = c2, is indeed the Pythagorean Theorem. This theorem states that in a right-angled triangle, the square of the length of the hypotenuse (c) is equal to the sum of the squares of the other two sides (a and b). Therefore, the answer "True" is correct.

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  • 12. 

    What is the midpoint of A(10, 3) and B(-2, 5)?                                                                                                        اكتب إحداثي منتصف المسافة بين النقطتين (A(10, 3) , B(-2, 5

    • (0, 4)

    • (4, 4)

    • (-2, 7)

    • (0, 3)

    • (2, 4)

    Correct Answer
    A. (4, 4)
    Explanation
    The midpoint of two points can be found by taking the average of their x-coordinates and the average of their y-coordinates. In this case, the x-coordinate of point A is 10 and the x-coordinate of point B is -2. Taking the average of these gives us (10 + (-2))/2 = 4. Similarly, the y-coordinate of point A is 3 and the y-coordinate of point B is 5. Taking the average of these gives us (3 + 5)/2 = 4. Therefore, the midpoint of A(10, 3) and B(-2, 5) is (4, 4).

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  • 13. 
    Which type of slope is shown? - ProProfs

    Which type of slope is shown?

    • Negative

    • Zero Slope

    • Undefined

    Correct Answer
    A. Undefined
    Explanation
    The question is asking about the type of slope shown, but it does not provide any information or context to determine the slope. Without any given values or a graph, it is impossible to determine the type of slope. Therefore, the answer is undefined.

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  • 14. 

    What is the midpoint of C(-5, 3) and D(6, -1)?اكتب إحداثي منتصف المسافة بين النقطتين

    • (1, 2)

    • (0.5, 1)

    • (-0.5, -1)

    • (5.5, 2)

    • (11, -5)

    Correct Answer
    A. (0.5, 1)
    Explanation
    The midpoint of a line segment is the average of the x-coordinates and the average of the y-coordinates of the two endpoints. In this case, the x-coordinate of the midpoint is (-5 + 6)/2 = 0.5 and the y-coordinate of the midpoint is (3 + (-1))/2 = 1. Therefore, the midpoint of C(-5, 3) and D(6, -1) is (0.5, 1).

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  • 15. 
    Which type of slope is shown? - ProProfs

    Which type of slope is shown?

    • Positive

    • Negative

    • Zero Slope

    • Undefined

    Correct Answer
    A. Negative
    Explanation
    The given correct answer is "Negative." This suggests that the slope shown is decreasing from left to right. In other words, as the x-values increase, the corresponding y-values decrease. This can be visualized as a line that slants downwards from left to right on a graph.

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  • 16. 
    Which type of slope is shown? - ProProfs

    Which type of slope is shown?

    • Positive

    • Negative

    • Zero Slope

    • Undefined

    Correct Answer
    A. Positive
    Explanation
    The correct answer is positive because the slope of a line is positive when it rises from left to right. In this case, the line is rising as we move from left to right, indicating a positive slope.

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  • 17. 

    Find the slope of the line though the pair of points.F(-5, 1), G(0, -9)

    • 2

    • -2

    • 1/2

    • -1/2

    Correct Answer
    A. -2
    Explanation
    To find the slope of a line passing through two given points, we can use the formula: slope = (y2 - y1) / (x2 - x1). In this case, the coordinates of point F are (-5, 1) and the coordinates of point G are (0, -9). Plugging these values into the formula, we get: slope = (-9 - 1) / (0 - (-5)) = -10 / 5 = -2. Therefore, the slope of the line passing through points F and G is -2.

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  • 18. 

    4Y-6X=10What is the slope of this line?

    • -3/2

    • 6/4

    • -6/4

    • 3/2

    • -2/3

    Correct Answer
    A. 6/4
    Explanation
    The given equation is in the form of y = mx + b, where m represents the slope of the line. By rearranging the equation to the form y = mx + b, we get y = 6/4x + 10/4. Comparing this with the standard form, we can see that the slope is 6/4.

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  • 19. 
    Which type of slope is shown? - ProProfs

    Which type of slope is shown?

    • Positive

    • Negative

    • Zero Slope

    • No Slope

    Correct Answer
    A. No Slope
    Explanation
    No Slope is the correct answer because the options Positive, Negative, and Zero Slope all indicate some degree of inclination or change in the slope. However, "No Slope" means that the line is completely horizontal and does not have any inclination or change in slope. Therefore, the correct answer is No Slope.

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  • 20. 
    According to the Theorem of Pythagoras,  - ProProfs

    According to the Theorem of Pythagoras, 

    • H = (a² + b²)

    • H² = √(a² + b²)

    • H = √(a² + b²)

    Correct Answer
    A. H = √(a² + b²)
    Explanation
    The answer h = √(a² + b²) is correct because it represents the formula derived from the Pythagorean Theorem. The Pythagorean Theorem states that in a right triangle, the square of the hypotenuse (h) is equal to the sum of the squares of the other two sides (a and b). Therefore, taking the square root of the sum of the squares of a and b gives us the length of the hypotenuse.

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  • 21. 
    According to the Theorem of Pythagoras, - ProProfs

    According to the Theorem of Pythagoras,

    • A² = h² - b²

    • A² = h² + b²

    • A = h - b

    Correct Answer
    A. A² = h² - b²
    Explanation
    The correct answer is a² = h² - b². This is the formula for the Pythagorean theorem, which states that in a right triangle, the square of the length of the hypotenuse (a) is equal to the difference between the squares of the lengths of the other two sides (h and b).

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  • 22. 

    A line l is parallel to the line 3y+5x+4=0 and passes through the point ( - 6, 6).Find the equation of the line l.

    • 3y = 5x + 12

    • Y = 5/3 x - 4

    • Y = - 5/3 x - 4/3

    • 3y+5x+12=0

    Correct Answer
    A. 3y+5x+12=0
    Explanation
    Parallel lines have equal gradients.
    Use the given point to substitute in x and y values,
    so as to find the value of c.

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  • 23. 

    A line has a gradient -2/3 and passes through the point (3,0).Find the equation of the line.

    • Y = - 2/3 x + 3

    • Y = - 2/3 x + 2

    • Y = 2/3 x + 2

    • Y = 2/3 x + 3

    Correct Answer
    A. Y = - 2/3 x + 2
    Explanation
    (3,0) is NOT the y-intercept.
    The line cuts the x-axis at (3,0).

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  • 24. 

    The midpoint of a line segment is (4, 2). If one of the endpoints is (-2, 3), what is the other endpoint?اكتب إحداثي منتصف نقطة النهاية

    • (10, 1)

    • (10, 4)

    • (-4, 4)

    • (-8, 4)

    • Cannot be determined

    Correct Answer
    A. (10, 1)

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Jan 22, 2016
    Quiz Created by
    Mathmath
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