Solve
Solve for x
7x + 49 = 0
7x + 49 = 0
7x = -49
x = -49/7
x = -7
What is the standard form of the quadratic equation?
ax2 + bx + c
What is the √ 144
12.
12x12 = 144
What is the vertex of the following equation:
f(x) = - (x+3)2 - 2
f(x) = - (x+3)2 - 2
vertex = (-3,-2)
Other than Math, what other subject did Ms.Cheng teach this year?
Phys-Ed
Solve for x
5x - 6 = 3x - 8
5x - 6 = 3x - 8
5x -3x -6 = -8
2x - 6 = - 8
2x = -8 +6
2x = -2
x = -2/2
x = -1
What is the vertex form of the quadratic equation?
What is :
42 - 4 x 5 = ?
Remember BEDMAS
42 - 4 x 5
= 16 - 4 x 5
= 16 - 20
= -4
What is the only number spelled with letters in alphabetical order?
forty
If Ms.Cheng ordered McDonalds what would she order?
Probably - a Junior Chicken
Solve for x
x2 - 15 - 21 = 0
x2 - 15 - 21 = 0
x2 - 21 = +15
x2 = 15 +21
x2 = 36
x = √36
x = 6 OR x = -6
What is the equation for sin law?
- see board -
72 - 4 (3) (-2) = ?
Remember BEDMAS
72 - 4 (3) (-2)
= 49 - 4(3)(-2)
= 49 - (12)(-2)
= 49 - (-24)
= 49 + 24
= 73
What letter does every odd number have in it?
the letter 'e'
What university did Ms. Cheng go to?
University of Waterloo / Queen's University
Solve for x
2(x-5)2 + 8 = 0
2(x-5)2 - 8 = 0
2(x-5)2 = 8
(x-5)2 = 8 / 2
(x-5)2 = 4
(x-5) = √ 4
x-5 = 2 or -2
x = 2+5 or -2+5
x = 7 or 3
What is the equation for cosine law?
- see board-
What is :
33 - 2 + 42 = ?
33 - 2 + 42
= (3x3x3) - 2 + (4x4)
= 27 - 2 + 16
= 41
When do you use tan? cos? sine?
tanθ = OPP / ADJ
cosθ = ADJ / HYP
sinθ = OPP / Hyp
What is Ms. Cheng's favourite CHIP flavour?
- DOUBLE points, if you guess the brand -
Lay's Barbeque
Solve for x
4x2 + 12x + 5 = 0
Find 2 numbers that add to 'b', multiply to ('a')('c')
2 numbers that add to 12, multiply to 20 are 10 & 2.
4x2 + 2x + 10x + 5 = 0
2x (2x + 1) + 5(2x +1)
(2x + 1) (2x + 5) <- set each term to 0.
2x + 1 = 0 ; x = -1/2
2x + 5= 0 ; x = -5/2
What is the quadratic formula?
An electric motor makes 3,000 revolutions per minutes. How many degrees does it rotate in one second?
What we know:
3,000 revolutions / minute
1 revolution (or rotation) = 360 degrees
How many revolutions in 1 second?
3,000 revolutions / 60 seconds = 50 revolutions
50 x 360 degrees = degrees it rotates in 60 seconds
50 x 360 = 18, 000
Therefore, it rotates 18,000 degrees in one second.
How many sides does a 'icosahedrons' have?
20 sides!
What was the last movie Ms. Cheng watched?
- hint: It was on Amazon Prime -
Cinderella!
(The 2021 remake with Camila Cabello)