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ALEKS MATH PLACEMENT TEST FOMULAS
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ALEKS MATH PLACEMENT TEST FOMULAS
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ALEKS MATH PLACEMENT TEST FOMULASPlace 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
, full circle degrees - Answers -360
length of arc - Answers -(n degree / 360 degrees) · 2 · pi · r
area of a sector - Answers -Area of a Sector = (central angle/360) x πr²
Area of a parallelogram - Answers -A=bh
sum of inside angles of a polygon - Answers -180 (n-2)
Area of a trapezoid - Answers -A=1/2h(b1+b2)
Volume of a right prism - Answers -V=Bh
Surface Area of a Right Prism - Answers -S=2B+Ph
Surface Area of a Cylinder - Answers -2πrh+2πr²
Volume of a cylinder - Answers -V=πr²h
Volume of a pyramid - Answers -1/3Bh
Surface Area of a Pyramid - Answers -1/2Pl+B
Surface Area of a Cone - Answers -πrl+πr²
Volume of a cone - Answers -1/3πr²h
Surface area of a sphere - Answers -4πr²
Volume of a sphere - Answers -4/3πr³
Quadratic Formula - Answers -x = -b ± √(b² - 4ac)/2a
simple interest - Answers -I=prt
mean - Answers -sum of the data/number of data entries
mode - Answers -The value that appears most frequently in a set of data
range - Answers -largest value - smallest value
Multiplying and dividing fractions - Answers -a/b * c/d = a*c/b*d AND a/b / c/d = a/b/c/d =
ad/bc
Equal To - Answers -=
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