Unit 1 More Quadratics
A factor of x2-11x+24 is...
a) x+3
b) x-3
c) x+4
d) x-4
What is x-3?
The box part of a box and whisker plot represents ___% of the data.
What is 50%?
a) piece of paper
b) pencil
c) basketball
d) tabletop
e) piece of spaghetti
f) soda can
pencil and spaghetti
The coordinate of the point (2,-4) under the dilation D-2 is...
(-4,8)
Khamyah solved a quadratic equation and found the solutions to be -3/2 and 6. The following factored form is equivalent to the quadratic equation that Khamya solved...
a) (x-6)(3x+2)=0 b) (x-6)(2x+3)=0
d) (x+6)(2x-3)=0 d) (x+6)(3x-2)=0
b) (x-6)(2x+3)=0
The solutions for 0 = 9x2-49 are...
a) +7 b) +3 c) +49/9 +7/3
What is +7/3?
The term "snowstorms of note" applies to all snowfalls over 6 inches. The snowfall amounts for snowstorms of note in Utica, New York, over a four-year period are as follows: 7.1, 9.2, 8.0, 6.1, 14.4, 8.5, 6.1, 6.8, 7.7, 21.5, 6.7, 9.0, 8.4, 7.0, 11.5, 14.1, 9.5, 8.6. The mean and population standard deviation for these data, to the nearest hundredth are...
mean = 9.46 s.d = 3.85
Angle 1 (75 degrees) and angle 2 (3x-15 degrees) are vertical angles. The value of x is...
30
The type of transformation that is not an isometry is...
a) (x,y) ->(x+6, y-2)
b) (x,y)->(y,-x)
c) (x,y) -> (1/2x, 1/2y)
d) (x,y) -> (-y,-x)
c
Gabby believes you should add ____ to both sides of this equation to complete the square: x2-8x = 5
16
Solve by factoring: 6x + 2x2 = 0
What is 0 and -3?
The number of points scored by a basketball player in the first 8 games of a season are shown below.
15,35,18,30,25,21,32,16. If she scored 24, 22, 27, and 28 points in the next four games, the data distribution would...
a) become less peaked and more widely spread
b) become less peaked and less widely spread
c) become more peaked and less widely spread
d) become more peaked and more widely spread
become more peaked and less widely spread
The image of the point (-3,-1) under the translation that shifts (x,y) to (x-2,Y+4) is...
(-5,3)
Triangle ABC is congruent to triangle XYZ. Give one congruence statement for 2 sides and one congruence statement for 2 angles.
answers vary
Solve \/(x-4) + 4 = x
{4,5}
Lava coming from the eruption of a volcano follows a parabolic path. The height h in feet of a piece of lava t seconds after it is ejected from the volcano is given by h(t) = -t2+16t+936. After ___ seconds the lava reaches its maximum height of 1000 feet.
What is 8 seconds?
The list below shows the number of free throws each of several basketball players on a team made at practice.
1,2,12,12,13,14. The mean absolute deviation of the number of free throws the players made is...
a) 3 b) 4 c) 5 d) 9
What are 5 free throws?
Angle ABD (3x+10 degrees) and angle DBC (2x degrees) are a linear pair. The measure of angle ABD is...
112
In right triangle BCD, BD = 12, m<C = 90, and m<DBC = 47. Find DC to the nearest tenth.
8.8
There are ___ real solutions to the quadratic equation 2x2+x+7=0 because the discriminant is _________.
0, negative
An object that is projected straight downward with initial velocity v feet per second travels a distance s = vt + 16t2, where t=time in seconds. If Miy is standing on a balcony 84 feet above the ground and throws a penny straight down with an initial velocity of 10 feet per second, in ___ seconds it will reach the ground.
What is 2 seconds?
The relationship of a woman's shoe size and length of a woman's foot, in inches, is given in the table.
Shoe Size 5 6 7 8
Foot length(in) 9.00 9.25 9.50 9.75
The linear correlation coefficient is...
a) 1 b) -1 c) 0.5 d) 0
What is 1?
In triangle ACB, D is the midpoint of AC and E is the midpoint of CB. AD is congruent to DC, DE || AB and DE = 4. Find AB. Draw the diagram.
8
A communications company is building a 30-foot antenna to carry cell phone transmissions. As shown in the diagram below, a 50-foot wire from the top of the antenna to the ground is used to stabilize the antenna. Find, to the nearest degree, the measure of the angle that the wire makes with the ground.
37
The solution set of the equation 4x2+13x=-9 is...
{-9/4, -1}