Math Midterm 7: Hunter College High School 2017
32 test answers
Unlock all answers in this set
Unlock answers 32question
Distributive Property of Multiplication over addition/subtraction
answer
a(b + c) = ab + bc
Unlock the answer
question
Inverse Property of Addition (Additive Inverse)
answer
(-a) + a = 0
Unlock the answer
question
Inverse Property of Multiplication (Multiplicative Inverse)
answer
a x 1/a = 1
Unlock the answer
question
Identity Property of Addition
answer
a + 0 = 0 + a = a
Unlock the answer
question
Identity Property of Multiplication
answer
a x 1 = 1 x a = a
Unlock the answer
question
Zero Property of Multiplication
answer
a x 0 = 0 x a = 0
Unlock the answer
question
Closure Property of Addition of Whole Numbers
answer
a E W and b E W then a + b E W
Unlock the answer
question
Closure Property of Multiplication of Whole Numbers
answer
a E W and b E W then ba E W
Unlock the answer
question
Prime
answer
A natural number with only 2 divisors, one and itself
Unlock the answer
question
Composite
answer
A natural number with more than 2 divisors
Unlock the answer
question
Find the no. of subsets of a given set: Formula
answer
Let n = the number of elements in the set. 2n = the number of subsets.
Unlock the answer
question
Complement of a set
answer
The complement Å of a set A, is the set of all elements, in U, which are not in set A.
Unlock the answer
question
R, Z, W, N: Stand for...
answer
R = real. Z = integers (...-2, -1, 0, 1, 2...) W = whole (every whole number: (0, 1, 2, 3, 4...) N = natural (every whole number except 0: (1, 2, 3, 4, 5...)
Unlock the answer
question
Divisibility Test: 2
answer
If it is even, it's divisible by 2. ex.: 6 is even and divisible by 2.
Unlock the answer
question
Divisibility Test: 3
answer
A number is divisible by 3 if the sum of its digits is divisible by 3. ex.: 342: 3 + 4 + 2 = 9, 9/3 = 3
Unlock the answer
question
Divisibility Test: 5
answer
The # must end in 5 or 0.
Unlock the answer
question
Divisibility Test: 7
answer
Example: 5308:1 5308 -2 530:6 530 -12 51:8 -16 35 35/7 = 5 So it is divisible by 7.
Unlock the answer
question
Divisibility Test: 11
answer
A number is divisible by 11 if the difference of the sums of alternating sets of digits is divisible by 11 or 0.
Unlock the answer
question
How do you find the number of factors a number has: Formula
answer
Put the number into prime factorization. Then take the exponents, add one, and multiply the exponents by each other. Ex: 345 = 3^1 x 5^1 x 23^1. (1+1)(1+1)(1+1) = 8. 345 has 8 divisors. Ex 2: 81 = 9^2 = (3^2)^2 = 3^4. 4 + 1 = 5.
Unlock the answer
question
Hehe guess:
answer
A number is divisible by 5^n iff the 5 rightmost n digits form a number divisible by 5^n.
Unlock the answer
question
The union
answer
The union of sets A & B is the set of all the elements which are in either Set A or Set B, or possibly both AUB = union of A & B.
Unlock the answer
question
Universal Set
answer
the universal set is the set of all elements considered in a particular problem U
Unlock the answer
question
Subset & Element Signs
answer
C = subset E = element ø = empty set
Unlock the answer
question
Intersection
answer
Intersection (n) of sets A & B is the set of all elements which are both in set A and set B.
Unlock the answer
question
Algebraic Expression
answer
An algebraic expression is an expression involving constants, variables, and arithmetic operations. The variables represent numbers although specific values are not always given.
Unlock the answer
question
Multiplicative Property of Equality
answer
if a = b then ac = bc
Unlock the answer
question
Addition Property of Equality
answer
if a = b then a+c = b+c
Unlock the answer
question
KESCA
answer
Key Equation Solution Check Answer Make a key, an equation, get a solution, check it, and there's your answer ;)
Unlock the answer
