Download Algebra 2, Chapter 9, Part 1, Test A

Algebra 1: Expressions Unit
Name _______Answer Key____________________
Period _______________ Date _________________
Review
I.
N-RN.3: I can apply properties of rational
and irrational numbers.
1. Part A:What is the product of
3. Given the triangle below, d is a rational number.
Explain why the perimeter is a rational number
6
11
and
?
7
12
17
84
11
b.
14
a.
c.
11
14
d.
17
84
d
d 3
d+2
Explanation: __ Perimeter is the sum of all sides,
-3 and 2 are rational numbers therefore the only
way for the sum to result in an rational number
is if all the sides are rational so d has to be a
rational number as well._____________________
Answer: ___C____
Part B: Is the product rational or irrational?
II. A-SSE.1a Learning Target: I can interpret
parts of an expression.
Answer: __Rational___
4. a. Given the expression 6xy identify the
coefficient.
2. The rectangle shown below has a length of 6 ft.
The value of the area, in square feet, is an
irrational number.
Answer: ____6_______
b. Given the expression 3x + 4xy – 9y + 2
identify the constant.
6 feet
w
Answer: ____2________
Complete the statement: rational number or
irrational number.
c. Given the expression x2 + 3x – 6
identify the factor of x.
The number w that represents the width of the
rectangle must be _Irrational___.
Answer: ____3________
Explanation: __Area is length times width. The
length of the rectangle is 6 which is a rational
number, therefore the only way for the product
to result in an irrational number is to multiply
by a rational to an irrational number._________
Algebra 1: Expressions Unit Review – Answer Key
05/27/14
PUHSD Algebra Curriculum Team
5. Given the expression x2 – 3x + 6, Carol
determined that there are three terms. Justify her
answer.
8. At the concert, the number of people entering
through Gate A is 5( x  4) and the number of
people entering through Gate B is 5x  4 , where
x  0 . Compare the number of people using
Gate A with those using Gate B.
Justification: _Terms are separted by addition or
subtraction signs since this expression has an
addition and a subtraction sign, the expression is
separated into 3 terms.______________________
Gate A
<, > ,=
Gate B
6. Evaluate the algebraic expression
2
  a  b  when a = 7 and b = 2 .
-25
III.
A-SSE.1b: I can interpret complicated
expressions by their parts.
Answer:__Gate A will always be more than Gate
B because the expression for Gate A is
multiplying by the sum of a number and 4,
where Gate B is multiply than adding 4 to that
product.________________________________
7. Part A: Explain whether 3x 2  y will be
positive or negative if x is positive.
x
y
Positive/Negative
9. Part A: Hector downloads 27 songs from iTunes each month for m months in a row. Write
an expression to show how many songs Hector
dowlown in all.
Answer: __27m_____
Part B: Find the number of songs Hector
downloaded in 2 years.
Answer: _Negative___
Part B: Is this always true?
Answer: _648 Songs_
Circle one: Always, Sometimes or Never
Algebra 1: Expressions Unit Review –Answer Key
05/27/14
PUHSD Algebra Curriculum Team