GUIDE DETAILED AND VERIFIED FOR GUARANTEED PASS, LATEST UPDATE
1. slope formula (y₂- y₁) / (x₂- x₁)
2. integers ..., -3, -2, -1, 0, 1, 2, 3, ...
3. rationals fractions (anything expessable as a ratio of integers)
4. reals integers, rationals, plus special #s (like 2 or pi)
5. order of oppera- PEMDAS (Parentheses / Exponents / Multiply / Divide / Add / Subtract)
tions
6. Arithmetic Se- t₁, t₁+ d, t₁+2d, ...
quences
7. Geometric Se- t₁, t₁· r, t₁· r², ...
quences
8. Factors ex. factors of 52 are 2, 4, 13, and 26
9. Multiples ex. multiples of 20 are 40, 60, 80, 100, ...
10. percentages part = (percent / 100) x whole
11. average average = sum of terms / number of terms
12. average speed average speed = total distance / total time
13. sum sum = average x (number of terms)
14. mode mode = value in the list that appears most often
15. median median = middle value in the list
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, SAT Math
Study online at https://quizlet.com/_9m26m
16. fundamental if an event can happen in N ways, and another, independent event can happen in
counting M ways, then both events together can happen in N x M ways.
principle
17. probability probability = number of desired outcomes / number of total outcomes
18. adding expo- x^a · x^b = x^(a+b)
nents
19. subtracting expo- x^a / x^b = x^(a-b)
nents
20. negative expo- 1 / x^b = x^(-b)
nents
21. multiplying expo- (x^a)^b = x^(a·b)
nents
22. x^0 1
23. roots (xy) = x · y
24. FOIL (x+a)(x+b) = x^2 + (b+a)x + ab
25. difference of a^2 -b^2 = (a+b)(a-b)
squares
26. a^2 + 2ab + b^2 (a+b)^2
27. a^2 - 2ab + b^2 (a-b)(a-b)
28. distance formula [(x₂- x₁)^2 + (y₂- y₁)^2)]
29. mid-point formu- [(x₁+ x₂)/2 , (y₁+ y₂)/2]
la
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