451813
Pregunta 1
Pregunta
Which is NOT an equivalent equation for 9x-3y=18
Respuesta
-
y=3x-6
-
y=1/3x-2
-
6x-2y=12
Pregunta 2
Pregunta
The midpoint of the line segment with endpoints A(-3,-3) and B(1,5) is at
Respuesta
-
(-2,2)
-
(-4,-8)
-
(-1,1)
-
(1,-1)
Pregunta 3
Pregunta
The length of a line segment with endpoints C(-5,2) and D(1,-4) is √20.
Respuesta
- True
- False
Pregunta 4
Pregunta
An equation for the circle with centre (0,0) and radius 4 is...
Respuesta
-
x²+y²=2
-
x²+y²=8
-
x²+y²=4
-
x²+y²=16
Pregunta 5
Pregunta
What is a median?
Respuesta
-
A line segment with a slope opposite to the one it is coming from.
-
A line segment from a vertex to the midpoint of the opposite side.
-
The middle line of a triangle.
Pregunta 6
Pregunta
All 120 seats in a hall were filled for a concert. The tickets cost $10 for adults and $6 for students. The total proceeds were $980. How many adults attended the concert? How many students?
Respuesta
-
73 adults, 15 students
-
66 adults, 20 students
-
65 adults, 30 students
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65 adults, 55 students
Pregunta 7
Pregunta
Find the equation for the circle that is centred at the origina and:
a) has a radius of 7
b) has a radius of √10
c) passes through the point (-5,12)
Respuesta
-
a) x²+y²=7 b)x²+y²=100 c)x²+y²=169
-
a) x²+y²=49 b)x²+y²=10 c)x²+y²=169
-
a) x²+y²=49 b)x²+y²=100 c)x²+y²=69
Pregunta 8
Pregunta
Find the equation for the circle that is centred at the origina and:
a) has a radius of 7
b) has a radius of √10
c) passes through the point (-5,12)
Respuesta
-
a) x²+y²=7 b)x²+y²=100 c)x²+y²=169
-
a) x²+y²=49 b)x²+y²=10 c)x²+y²=169
-
a) x²+y²=49 b)x²+y²=100 c)x²+y²=69
Pregunta 9
Pregunta
Find the equation for the circle that is centred at the origina and:
a) has a radius of 7
b) has a radius of √10
c) passes through the point (-5,12)
Respuesta
-
a) x²+y²=7 b)x²+y²=100 c)x²+y²=169
-
a) x²+y²=49 b)x²+y²=10 c)x²+y²=169
-
a) x²+y²=49 b)x²+y²=100 c)x²+y²=69
Pregunta 10
Pregunta
Find the equation for the circle that is centred at the origina and:
a) has a radius of 7
b) has a radius of √10
c) passes through the point (-5,12)
Respuesta
-
a) x²+y²=7 b)x²+y²=100 c)x²+y²=169
-
a) x²+y²=49 b)x²+y²=10 c)x²+y²=169
-
a) x²+y²=49 b)x²+y²=100 c)x²+y²=69
Pregunta 11
Pregunta
Find the equation for the circle that is centred at the origina and:
a) has a radius of 7
b) has a radius of √10
c) passes through the point (-5,12)
Respuesta
-
a) x²+y²=7 b)x²+y²=100 c)x²+y²=169
-
a) x²+y²=49 b)x²+y²=10 c)x²+y²=169
-
a) x²+y²=49 b)x²+y²=100 c)x²+y²=69
Pregunta 12
Pregunta
Find the equation for the circle that is centred at the origina and:
a) has a radius of 7
b) has a radius of √10
c) passes through the point (-5,12)
Respuesta
-
a) x²+y²=7 b)x²+y²=100 c)x²+y²=169
-
a) x²+y²=49 b)x²+y²=10 c)x²+y²=169
-
a) x²+y²=49 b)x²+y²=100 c)x²+y²=69
Pregunta 13
Pregunta
A triangle has vertices A(-1,1), B(3,5) and C(5,-1). What kind of triangle is triangle ABC?
Respuesta
-
Right triangle.
-
Equilateral triangle.
-
Isosceles triangle.
-
Right isosceles triangle.
-
Scalene triangle.
Pregunta 14
Pregunta
Name the zeroes and the vertex of this equation: y=-4(x-1)(x-9).
Respuesta
-
(-1,-9) (64,5)
-
(-1,9) (5,64)
-
(1,9) (5,64)
-
(1,9) (64,5)
Pregunta 15
Pregunta
Evaluate.
a)4^0
b)5^-1
c)(-3^)-3
d)(3/4)^-2
Respuesta
-
a)-1 b)1/5 c)1/27 d)16/9
-
a)1 b)1/5 c)-1/27 d)16/9
Pregunta 16
Pregunta
Board feet are used to measure the total length (in feet) of boards that are 1 inch thick and 1 foot wide that can be cut from a tree to make lumber. You can use the equation l=0.011a²-0.68a+13.31 to estimate the number of hundred of board-feet available in a certain type of tree, where "l" is the number of board-feet and "a" is the age,in years,of the tree. What is the approx. number of board-feet available to cut from a 40 year old tree? A student said the answer was 371. Is this answer true or false?
Respuesta
- True
- False
Pregunta 17
Pregunta
Use the distributive property to find the binomial product : (x+5)(x+8)
Respuesta
-
x²+13x+40
-
x²+40x+40
Pregunta 18
Pregunta
Factor by grouping:
16X²-12xy-12xy+9y²
Respuesta
-
(4x-3y)²
-
(3x-4y)²
Pregunta 19
Pregunta
A rectangle has area defined by 8x²+2x-15.
Factor to find the expression for the length and width of the rectangle.
If x=12, what is the perimeter of the rectangle?
Respuesta
-
4x-5, 2x+3 140 cm
-
2x+4,5x-3 130 cm
Pregunta 20
Pregunta
Determine all values of k so that these trinomials are perfect squares:
9x²-42x+k
25y²+ky+144
Respuesta
-
a)120,-120 b)49
-
a) 49 b) 120,-120
Pregunta 21
Pregunta
Solve.
y²= 8y+9
30 x-25x²=9
Respuesta
-
(9,-1) (3/5)
-
(9,1) (3/-5)
Pregunta 22
Pregunta
The length of the hypotenuse of a right triangle is 1 cm more than triple that of the shorter leg. The length of the longer leg is 1 cm less than triple that of the shorter leg. Find all three lengths. A student gave the answers as 12, 35 , 35. Are they right or wrong?
Respuesta
- True
- False
Pregunta 23
Pregunta
Fin the value(s) of k so that each parabola has only one x-intercept.
y= x²+kx+100
y= -4x²+28+k
Respuesta
-
20,-20 -49
-
20,10 49
Pregunta 24
Pregunta
The hypotenuse of a right triangle has length 17 cm. The sum of the lengths of the legs is 23 cm. What are their lengths?
Respuesta
-
8,15
-
13,10
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