Discriminant
Quadratic formula
Word Problems
Word Problems #2
Pi Day / Fun Friday
100
What is the formula for finding the discriminant of a quadratic equation?
D =
b^2-4ac
100
Sing the song for the quadratic formula without making a mistake.
x=(-b±sqrt(b^2-4ac))/(2a)
100
The formula for the area of a triangle?
A=(b*h)/2
100
The theorem used to find the missing side of a triangle.
Pythagorean Theorem
a^2+b^2=c^2
100
What time is it?
2:45
200
Is the discriminant positive, negative, or zero?
Positive
200
solve using the quadratic formula :
2x2+4x-6=0
x=-3 , x=1
200
Write an equation that expresses the following:
The width is 5 more than twice the length.
w=2l+5
200
A football is punted in the air. Its height (in inches) after t seconds is represented with the function h(t)=-5t^2-20t+25 . After how long will the football hit the ground?
1 second (It was Ms. G trying to kick the football)
200
Name the shape
Octagon
300
If the discriminant is 0, how many roots (x-intercepts) will the graph have?
1
300
solve using the quadratic formula:
x2 + 3x – 4 = 0
x= -4,1
300
Write an equation that expresses the following:
The height is 4 less than three times the base.
h=3b-4
300
The base of a triangle is eight more than twice the height. The area of the triangle is 42 square yards. Find the base of the triangle.
Height = 3 yards, Base = 14 yards
300
Is your birthday in the digits of pi?
pi
Yes!
400
Find the value of the discriminant of
-2x2-1x+3=0
D=25
400
solve using the quadratic formula:
2x2-3x-5=0
x= 2.5, -1
400
The length of a rectangular plot is 10 yards more than its width. If the area of the land is 600 square yards, find the dimensions of the plot.
Length = 30 yds2, Width = 20 yds2
400
An architect wants to put a triangular window above the doorway. The architect wants an area of 120 square feet and she wants the base to be 4 feet more than twice the height. Find the base and height of the window.
Height= 10 feet, Base = 24 feet
400
How many degrees are in a circle?
360o
500
Find the value of the discriminant of
6x2= 42
D=1008
500
solve using the quadratic formula :
x2 – 4x – 8 = 0
x=2±sqrt(3)
500
A rocket is launched from the ground. Its height in miles is measured after t seconds using the formula given below. How long until it hits the ground?
h(t)=-16t^2+192t
12 seconds
500
The area of a triangular flower bed in the park has an area of 120 square feet. The base is 4 feet longer that twice the height. What are the base and height of the triangle?
Height = 10 feet, Base = 24 feet
500
The best flavor of pie.
Lemon Meringue