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Need-to-Know ACT Math Formulas (Barrons)All the important and most forgotten formulas needed to know for the ACT CA$11.39   Add to cart
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Need-to-Know ACT Math Formulas (Barrons)All the important and most forgotten formulas needed to know for the ACT
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Need-to-Know ACT Math Formulas (Barrons)All the important and most forgotten formulas needed to know for the ACT Pythagorean theorem Correct Answer: a^2 + b^2 = c^2 Circumference of a circle Correct Answer: C= (3.14)(d) Area of a circle Correct Answer: A=(3.14)(r^2) distance formula ...

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  • August 26, 2022
  • 2
  • 2022/2023
  • Exam (elaborations)
  • Questions & answers

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  • act
  • act math formulas
  • need to know act math formulas barronsall the important and most forgotten formulas needed to know for the act
  • need to know act math formulas barrons

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Need-to-Know ACT Math Formulas (Barrons)All the
important and most forgotten formulas needed to know for
the ACT
Pythagorean theorem Correct Answer: a^2 + b^2 = c^2

Circumference of a circle Correct Answer: C= (3.14)(d)

Area of a circle Correct Answer: A=(3.14)(r^2)

distance formula Correct Answer: D=(r)(t)

arithmetic sequence formula (explicit) Correct Answer: an = a1 + (n - 1)d

Sum of arithmetic sequence Correct Answer: S = (n/2) (a1 +(a1+(n-1)d)) or S =
(n/2) (a1 + an)

Geometric sequence formula Correct Answer: an=a1(r)^n-1

Geometric Series formula Finite Correct Answer: Sn = a1 (1-r^n) / (1-r)

Combination formula Correct Answer: nCr=n!/r!(n-r)

Permutation Correct Answer: nPr=n!/(n-r)!

parabola Correct Answer: y=a(x-h)^2+k

circle Correct Answer: (x-h)^2+(y-k)^2

ellipse Correct Answer: ((x-h)^2/a^2) + ((y-k)^2/b^2)= 1

hyperbola Correct Answer: ((x-h)^2/a^2) - ((y-k)^2/b^2)= 1

Inscribed angle Correct Answer: IA=central angle(or intercepted arc)/2

Property of Parallelogram Correct Answer: Opposite sides are parallel and
congruent
opposite angles are congruent
consecutive angles are supplementary

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