Q. If the line 3x + 4y = 12 intersects the x-axis, what is the x-coordinate of the intersection point?
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Solution
Set y = 0 in the equation: 3x = 12 => x = 4.
Correct Answer: A — 4
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Q. If the line 3x + 4y = 12 is transformed to slope-intercept form, what is the slope?
A.
-3/4
B.
3/4
C.
4/3
D.
-4/3
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Solution
Rearranging gives y = -3/4x + 3. The slope is -3/4.
Correct Answer: A — -3/4
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Q. If the line 3x + 4y = 12 is transformed to slope-intercept form, what is the y-intercept?
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Solution
Rearranging gives y = -3/4x + 3. The y-intercept is 3.
Correct Answer: B — 4
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Q. If the line 3x - 4y + 12 = 0 is parallel to another line, what is the slope of that line?
A.
3/4
B.
-3/4
C.
4/3
D.
-4/3
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Solution
The slope of the line is given by -A/B = -3/-4 = 3/4. Parallel lines have the same slope.
Correct Answer: B — -3/4
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Q. If the line 3x - 4y + 12 = 0 is transformed to slope-intercept form, what is the slope?
A.
3/4
B.
-3/4
C.
4/3
D.
-4/3
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Solution
Rearranging gives y = (3/4)x + 3, so the slope is -3/4.
Correct Answer: B — -3/4
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Q. If the line 5x + 12y = 60 is transformed to slope-intercept form, what is the slope?
A.
-5/12
B.
5/12
C.
12/5
D.
-12/5
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Solution
Rearranging gives y = -5/12 x + 5, so the slope is -5/12.
Correct Answer: A — -5/12
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Q. If the line 5x + 2y = 10 intersects the y-axis, what is the y-coordinate of the intersection point?
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Solution
Setting x = 0 in the equation gives 2y = 10, hence y = 5.
Correct Answer: B — 2
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Q. If the line 5x - 2y + 10 = 0 is reflected about the x-axis, what is the new equation?
A.
5x + 2y + 10 = 0
B.
5x - 2y - 10 = 0
C.
5x + 2y - 10 = 0
D.
5x - 2y + 10 = 0
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Solution
Reflecting about the x-axis changes the sign of y-coefficient: 5x + 2y + 10 = 0.
Correct Answer: A — 5x + 2y + 10 = 0
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Q. If the line y = mx + 1 is perpendicular to the line 2x + 3y = 6, what is the value of m?
A.
-3/2
B.
2/3
C.
3/2
D.
-2/3
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Solution
Slope of 2x + 3y = 6 is -2/3, so m = 3/2 (negative reciprocal).
Correct Answer: A — -3/2
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Q. If the lines represented by the equation 2x^2 + 3xy + y^2 = 0 are intersecting, what is the condition on the coefficients?
A.
D > 0
B.
D = 0
C.
D < 0
D.
D = 1
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Solution
The lines intersect if the discriminant D = b^2 - 4ac > 0.
Correct Answer: A — D > 0
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Q. If the lines represented by the equation 2x^2 + 3xy + y^2 = 0 intersect at the origin, what is the sum of the slopes?
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Solution
The sum of the slopes of the lines can be found using the relation -b/a, which gives -3.
Correct Answer: A — -3
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Q. If the lines represented by the equation 3x^2 + 2xy - y^2 = 0 intersect at an angle of 60 degrees, what is the value of the coefficient of xy?
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Solution
Using the formula for the angle between two lines, we can derive the coefficient of xy that satisfies the angle condition.
Correct Answer: A — 2
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Q. If the lines represented by the equation 3x^2 + 2xy - y^2 = 0 intersect at the origin, what is the product of their slopes?
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Solution
The product of the slopes of the lines can be found from the equation. Here, the product of the slopes is given by -c/a, where c is the coefficient of xy and a is the coefficient of x^2.
Correct Answer: A — -1
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Q. If the lines represented by the equation 3x^2 + 4xy + 2y^2 = 0 are perpendicular, what is the value of k?
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Solution
For the lines to be perpendicular, the condition 4 - 4(3)(2) = 0 must hold, leading to k = 0.
Correct Answer: A — -1
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Q. If the lines represented by the equation 3x^2 + 4xy + 2y^2 = 0 intersect at the origin, what is the product of their slopes?
A.
-2/3
B.
-3/2
C.
0
D.
1
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Solution
The product of the slopes of the lines represented by ax^2 + bxy + cy^2 = 0 is given by c/a. Here, c = 2 and a = 3, so the product is 2/3.
Correct Answer: A — -2/3
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Q. If the lines represented by the equation 4x^2 + 4xy + y^2 = 0 are coincident, what is the value of k?
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Solution
The lines are coincident when the determinant of the coefficients is zero, leading to k = 0.
Correct Answer: A — 0
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Q. If the lines represented by the equation 5x^2 + 6xy + 5y^2 = 0 are intersecting, what is the nature of the intersection?
A.
Acute
B.
Obtuse
C.
Right
D.
None
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Solution
The nature of the intersection can be determined by the slopes, which indicate that the angle is obtuse.
Correct Answer: B — Obtuse
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Q. If the lines represented by the equation 5x^2 + 6xy + 5y^2 = 0 intersect at the origin, what is the angle between them?
A.
0 degrees
B.
45 degrees
C.
90 degrees
D.
60 degrees
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Solution
The angle can be found using the formula tan(θ) = |(m1 - m2) / (1 + m1*m2)|, where m1 and m2 are the slopes derived from the equation.
Correct Answer: C — 90 degrees
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Q. If the lines represented by the equation 6x^2 + 5xy + y^2 = 0 intersect at the origin, what is the sum of their slopes?
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Solution
The sum of the slopes of the lines is given by -b/a, which is 0 in this case.
Correct Answer: D — 0
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Q. If the lines represented by the equation 6x^2 - 5xy + y^2 = 0 are intersecting, what is the nature of the roots?
A.
Real and distinct
B.
Real and equal
C.
Complex
D.
Imaginary
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Solution
The nature of the roots can be determined by the discriminant of the quadratic equation.
Correct Answer: A — Real and distinct
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Q. If the lines represented by the equation 6x^2 - 5xy + y^2 = 0 are perpendicular, what is the value of 6?
A.
True
B.
False
C.
Depends on x
D.
Depends on y
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Solution
The lines are not perpendicular as the condition for perpendicularity is not satisfied.
Correct Answer: B — False
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Q. If the lines represented by the equation 6x^2 - 5xy + y^2 = 0 are real and distinct, what is the condition on the coefficients?
A.
D > 0
B.
D = 0
C.
D < 0
D.
D = 1
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Solution
The condition for the lines to be real and distinct is that the discriminant D must be greater than 0.
Correct Answer: A — D > 0
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Q. If the lines represented by the equation ax^2 + 2hxy + by^2 = 0 are perpendicular, then:
A.
a + b = 0
B.
ab = h^2
C.
a = b
D.
h = 0
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Solution
For the lines to be perpendicular, the condition a + b = 0 must hold.
Correct Answer: A — a + b = 0
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Q. If the lines represented by the equation x^2 + 2xy + y^2 = 0 are coincident, what is the value of the constant term?
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Solution
For the lines to be coincident, the constant term must be zero.
Correct Answer: A — 0
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Q. If the pair of lines represented by ax^2 + 2hxy + by^2 = 0 are perpendicular, then:
A.
a + b = 0
B.
a - b = 0
C.
h = 0
D.
a = b
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Solution
For the lines to be perpendicular, the condition a + b = 0 must hold.
Correct Answer: A — a + b = 0
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Q. If the pair of lines represented by the equation ax^2 + 2hxy + by^2 = 0 are perpendicular, then:
A.
a + b = 0
B.
a - b = 0
C.
h = 0
D.
a = b
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Solution
For the lines to be perpendicular, the condition a*b + h^2 = 0 must hold.
Correct Answer: A — a + b = 0
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Q. If the parabola y = ax^2 + bx + c has its vertex at (1, -2), what is the value of a if it passes through the point (0, 0)?
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Solution
Using the vertex form y = a(x - 1)^2 - 2 and substituting (0, 0), we get 0 = a(0 - 1)^2 - 2 => 2 = a => a = 2.
Correct Answer: B — 2
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Q. If the parabola y^2 = 16x opens to the right, what is the value of p?
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Solution
In the equation y^2 = 4px, we have 4p = 16, thus p = 4.
Correct Answer: B — 4
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Q. If the parabola y^2 = 20x opens to the right, what is the value of p?
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Solution
In the equation y^2 = 4px, we have 4p = 20, thus p = 20/4 = 5.
Correct Answer: A — 5
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Q. If the points (1, 2), (3, 4), and (5, 6) are collinear, what is the slope of the line?
A.
1
B.
2
C.
0
D.
undefined
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Solution
Slope = (4-2)/(3-1) = 1, and it remains the same for other points.
Correct Answer: A — 1
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