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Math ACT Rev Answer Key

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Math (Equations/formulas)
#1 What is the formula you would use if you could not factor the equation? what is the quadratic formula
#2 what is the distance formula? what is
#3 What is the formula to find volume of a cylinder? what is
#4 How do you find the area of any triangle? what is to multiply 1/2 of the base and the height
#5 Name the formula for both the area and circumfrence of a circle what is A=pi x radius squared C= pi x diameter
Math (number properties)
#1 When is a number, a/(bc) ,undefined? what is whenever b or c is equal to 0
#2 what is the difference between a real and imaginary number? what is real is located on a number line, and imaginary numbers are the square root of a negative number
#3 what is the difference between rational and irrational numbers? what is that rational numbers can be expressed as a ratio of two intergers. Irrational numbers are real but cannot be expressed as a fraction or decimal
#4 What is the difference between LCM and GCF? what is GCF is the greatest common factor(prime factors in common) LCM is the least common multiple(multiples of the larger number that equals the smalles)
#5 What is the difference between factors and multiples? what is that factors are the interger that divides into a number evenly. Multiples are numbers that the Interger can divide into evenly.
Math (triangles)
#1 What are the two special right triangles? what is 30,60,90 and 45,45,90
#2 What do the interior angles of a triangle add up to be? What is 180
#3 If two triangles are similar and have similar angles the corresponding sides are... proportional
#4 What is the formula for Pythagorean theorem? what is A^2+B^2=C^2
#5 The exterior angle of a triangle is equal to the sum of ...? what is the sum or the remote interior?
Math (polygons)
#1 What is the formula for the area of a trapezoid? What is (1/2)(base1 plus base 2 )(height)
#2 How do you find the measure of an interior angle of a polygon? what is (n-2) times 180 all over n
#3 what is the formula to find the sum of the interior angles? What is (n-2) times 180
#4 What is the formula to find the length of an arc? What is N over 360 times ( 2 pi r)
#5 What is the formula for the volume of a sphere? 4/3 times pi r^3
Math (algerbraic expressions)
#1 What is the factored form of the expression x^2-8x-48 What is (x-12)(x+4)
#2 What does i^2 and i^4 =? what is -1 and +1
#3 if two sides of the triangle are 6 and 8 what is the hypotenuse? what is 10
#4 What is (x-5) (2x +3)? What is 2x^2 -7x -15
#5 If f(x) = x+2 and g(x)= x^2 + 5, what is g[f(x)] ? What is x^2 + 4x +9
Final Question