Review for Unit 2 Quiz 1. Review for U2 Quiz 1 Solve. We will check them together. I will answer...
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Review for Unit 2 Quiz 1
Combine like terms. SHOW EACH STEP!
(a) (8x – 4)7 + 2 (b) 8z + 9(3z -2)
Linear expressions
Combine like terms. SHOW EACH STEP!
(a) (8x – 4)7 + 2 (b) 8z + 9(3z -2)
56x – 28 + 2 8z + 27z – 18
56x – 2635z - 18
Linear expressionsAnswers for previous slide
Solve for x. SHOW EACH STEP!
5x – 10 + x + 13 = -3
Linear equations
Solve for x. SHOW EACH STEP!
5x – 10 + x + 13 = -3
6x – 10 + 13 = -3
6x + 3 = -3
6x + 3 – 3 = -3 -3
6x = -6
6 6
x = - 1
Linear equationsAnswers for previous slide
Approximate the non-perfect square roots below to the nearest tenth.
Approximating radicals
Approximate the non-perfect square roots below to the nearest tenth.
7 84 5
.93 .6
7.9 4.7
Approximating radicalsAnswers for previous slide
Simplify the radical below. (1) (2)
Simplifying radicals
Simplify the radical below. (1) = x = 4
(2) = x = 3
Simplifying radicalsAnswers for previous slide
Change the repeating decimals to fractions.
(a) .5 (b) .24 (c) 2.7
Changing repeating decimalsTo fractions
Change the repeating decimals to fractions.
(a) .5 (b) .24 (c) 2.7
x = .5 x=.24 x= .7
10x= 5.5 100x=24.24 10x = 7.7
- x = - .5 -x= .5 -x = - .7
9x = 5 99x = 24 9x = 2
9 9 99 99 9
Changing repeating decimalsTo fractions
Answers for previous slide
A rational number is _______________________________________________________________________.
Give 2 examples.
An irrational number is _______________________________________________________________________.
Give 2 examples.
The real number system
A rational number is a real number that can be written as a ratio of 2 integers or as a fraction.
Give 2 examples. (any: terminating decimals, repeating decimals, fractions, whole numbers, natural numbers, integers, perfect square roots, perfect cube roots)
An irrational number is a real number that can NOT be written as a ratio of 2 integers or as a fraction.
Give 2 examples.(any: non-terminating decimals, non-repeating decimals, non-fractions, non-perfect square roots, non-perfect cube roots)
The real number systemAnswers for previous slide
