Quadratics
A quadratic has x-intercepts -2 and 8. What is the equation of its axis of symmetry?
x=3
Is this equation growth or decay
y= -4(3)^x
Growth
A box plot has Q1 = 12 and Q3 = 20. What percentage of the data lies between Q1 and Q3?
50 percent
What letter starts with T , is filled with T, and ends with T
TEAPOT
Unscramble
pcienl
Pencil
Solve the quadratic equation:
47=(x-2)^2-2
x= 10, -4
Write an exponential model for 12 % growth starting at 50
y= 50(1.12)^t
A five-figure summary is: 4, 9, 12, 18, 31. Find the range and IQR.
range = 27 , IQR =9
This is the only number that has the same number of letters as its meaning
4
If I start facing north turn, 270 degrees clockwise and then make a quarter turn to my left , which direction am i facing?
SOUTH
Find the minimum value of
y= x^2 - 8x + 7
-9
Solve
9^(x - 1) = 27^(2x - 3).
x= 7/4
A data set has Q1 = 12 and Q3 = 24. A value of 42 is marked as an outlier. Is this correct?
no
Six farmers catch six lambs in six minutes.
How many farmers will be needed to catch sixty lambs in sixty minutes?
6 farmers
"I have keys but no locks. I have space but no room. You can enter, but you can't go outside. What am I?
Keyboard
The graph below touches the x-axis exactly once. Find all possible values of k
y = x^2 + kx + 9
k= 6 or k=-6
A $1000 item depreciates to $729 after 3 years. Assuming exponential depreciation, what percentage does it lose each year?
10% per year
A data set has five-figure summary
10, 18, 24, 30, 42.
Every value in the data set is increased by 5.
What happens to the median and the IQR?
median 29. IQR same
When asked about his birthday, a man said:"The day before yesterday I was only 25 and next year I will turn 28."This is true only one day in a year - when was he born?
He was born on December 31st and spoke about it on January 1st.The day before yesterday I was only 25...'
Dec 30: 25
Dec 31: 26
Jan 1 (this year): 26
'...next year I will turn 28'
Dec 31 (this year): 27
Dec 31 (next year): 28
The length of a rectangle is 3 units more than the width. The area of the rectangle is 54 units.
What is the width of the rectangle
width = 6 units
A parabola opens downward, has x-intercepts 1 and 7, and a maximum value of 18. Find its equation.
y = -2(x - 1)(x - 7)
An exponential function has value 640 when t = 2 and value 409.6 when t = 4.
Find its rule in the form
A = ab^t.
A = 1000(0.8)^t
The ordered data are 2, 4, x, 8, 11, 13, 17, 20, 24, 29. The IQR is 14. Find x.
x=6
There are 116 students taking the statistics exam.
1/4 of the girls and 1/7 of the boys earn an A .
Together ,23 students earn an A.
How many girls are there in the class?
60
Australia's national science agency, CSIRO, invented and patented this revolutionary wireless technology in the 1990s, which is now used globally every day.
Wi-Fi