ALEKS MATH PLACEMENT TEST FOMULAS
Place Value - Answers -The value of a digit based on its position within a number
Fractions - Answers -A number expressed in the form a/b where a is a whole number
and b is a positive whole number.
Adding and Subtracting with the same denominator - Answers -a/b + c/b = a+c/b OR a/b
- c/b = a-c/b
Adding and Subtracting with different denominators - Answers -a/b + c/d = ad+cb/bd OR
a/b - c/d = ad-cb/bd
perpendicular lines - Answers -Lines that intersect to form right angles
m1*m2 = -1
midpoint of the segment AB - Answers -(x1+x2/2, y1+y2/2)
point-slope form - Answers -y-y1=m(x-x1)
intersecting lines - Answers -a+b=180
slope intercept form - Answers -y=mx+b, where m is the slope and b is the y-intercept of
the line.
transversal - Answers -eight angles are formed when a line crosses two parallel lines.
the four big angles (a) are equal, and the four small angles (b) are equal
parabola - Answers -y=ax^2+bx+c
Pythagorean Theorem - Answers -a²+b²=c²
Area of a triangle - Answers -A=1/2bh
sum of triangle angles - Answers -180˚
isosceles - Answers -A triangle that has 2 equal sides.
similar triangles - Answers -Similar triangles have the same shape: corresponding
angles are equal and corresponding sides are proportional
area of a circle - Answers -A=πr²
Circumference of a circle - Answers -2πr
