Algebra
What do we use to represent variables in Algebra?
Letters of the alphabet
What letters of the alphabet do we use to represent variables?
The last ones: x,y,z...
23+47=?
70
What's Einstein's famous formula?
E=mc2
Reduce: 140x2 - 64x2 = ?
76x2
Hiw do you call the next letter: a' ?
hint, it's not just "a"
a prime
What letters of the alphabet do we use to represent a constant?
The first ones: a,b,c...
145+250=?
395
What's the pythagorean theorem formula?
a2+b2=c2
Solve: 4x + 11 = 3
x = -2
What is Algebra?
The branch of maths which studies the considered quantity on the most general way possible
What does this symboo mean: "≈" ?
Approximately equal to
(7)(12)=?
84
Formula for the Area of a circle and area of a triangle
Circle: 𝝿 r2 or: (𝝿(D)2)/4
Triangle:(b*h)/2
Solve for x: (3x2/x) - (6x/x) =0
X=2
What's the absolute value of the number: -$125 ?
l 125 l
What's the hierarchy of operations of an equation?
Parentheses, powers and roots, multiplication and division, and addition and substraction
132=?
169
What's the formula for a perfect square binomial (a+b)2?
a2+2ab+b2
Factorize the nex equation, you have 2 minutes:
x² + 11x +28
(X + 4)(X + 7)
A rectangle with an area of 27cm2 has a base 3 times larger than the hight, what are the values for the length and hight?
Lenght=9cm
Hight=3cm
Identify the coefficients, constant, exponents, operators and variables of the next equation's terms:
12x3-3y2+23
Coefficients: 12, 3
Contstant:23
Exponents:3, 2
Operators: -, +
Variables: x, y
(you have 20 seconds)
144/36 - 2 =?
2
(-b± √ (b2-4ac))/(2a)
Solve for x: X(1/2)=12
144