Test 5, Unit 4 (4.16 - 4.33) Flashcards
(56 cards)
1
Q
-6
+(-9)
A
-15
2
Q
+5
x(-4)
A
-20
3
Q
+36 divided by +12
A
3
4
Q
- 11
- (-18)
A
7
5
Q
-9
x(-8)
A
72
6
Q
45 divided by -5
A
-9
7
Q
15
-(+7)
A
8
8
Q
31
+(-8)
A
23
9
Q
(12x3)(3xy2)
A
36x4y2
10
Q
(40m3n) divided by (5m)
A
8m2n
11
Q
square root of 100
A
10
12
Q
33
A
27
13
Q
25
A
32
14
Q
negative square root of 49
A
-7
15
Q
_+_square root of 64
A
_+_8
16
Q
252
A
625
17
Q
square root of 81
A
9
18
Q
square root of 1,225
A
96
19
Q
4x + 6 = 34
A
4x + 6 - 6 = 34 - 6
4x/4 = 28/4
x = 7
20
Q
x/4 = 8 * 3
A
x/4 = 24
4 * x/4 = 24 * 4
x = 96
21
Q
2x2 + 3x2
A
5x2
22
Q
3y3 + 2x2y + 4x2y + 5y3
A
8y3 + 6x2y
23
Q
4a2b - 2ab + 4ab - ab - 3a2b
A
4a2b - 3a2b + 4ab - 2ab - ab
1a2b + 1ab
write this as:
a2b + ab
24
Q
m3 + m2 + 2m2 - m3
A
3m2
25
x2 + 2x2 - 12 - 15
3x2 - 27
26
x = 8 + 5
x = 13
27
3x = 15
3x/3 = 15/3
x = 5
28
x/5 = 12
5 \* x/5 = 12 \* 5
x = 60
29
4x - 6 = 2x + 10
4x - 2x - 6 = 2x - 2x + 10
2x - 6 + 6 = 10 + 6
2x = 16
x = 8
30
.3x = 18
.3x \* 10 = 18 \* 10
3x = 180
3x/3 = 180/3
x = 60
31
The principle square root of 144 is -12
F
32
A negative number plus a negative number is a positive number
F
33
The cube root of 8 is 2
T
34
The algebraic expression 3x2 - 6 can be read as six less than three times x squared
T
35
In /25 (the square root of 25) , the 25 is called an index
F
36
The square root of 17 is an irrational number
T
37
Only whole numbers are rational numbers
F
38
x5 means x + x + x + x + x
F
39
The number -13 is greater than -15
T
40
The absolute value of -8 is 8
T
41
multiply 6x by 3x3y
18x4y
42
find the positive square root of 196
14
43
divide -18 by 3
-6
44
write the absolute value of -9
9
45
divide y5 by y7
1 over y2
46
write the number of terms in 6x2y + 2xy + 8
3
47
Add +5 and -5
0
48
Evaluate 4x3 + 6xy if x is 2 and y is -4
4(23) + 6(2)(-4) =
4 (8) + 12(-4) =
32 + (-48) =
-16
49
Evaluate 3abc if a = 6, b = -4, c = 0
3(6)(-4)(0) =
0
50
Evaluate x2 - y2 if x = -4 and y = .5
(-4)2 - (.5)2 =
16 - .25 =
15.75
51
A certain number plus 8 equals 24. What is the number?
x + 8 = 24
x + 8 - 8 = 24 - 8
x = 16
52
Mary and Marsha have a combined age of 36. Marsha is twice as old as Mary. How old is Mary?
x + 2x = 36
3x = 36
3x/3 = 36/3
x = 12
53
Separate the number 53 into three parts so that the second number is 3 less than the first number and the third number is twice the first number. Give the value of the second number.
x + x - 3 + 2x = 53
4x - 3 = 53
4x - 3 + 3 = 53 + 3
4x = 56
4x/4 = 56/4
x = 14
The second number is 3 less than the first number, so the first number is 14, the second is 11.
14 - 3 = 11
54
Three times a certain number is 21. What is the number?
3x = 21
3x/3 = 21/3
x = 7
55
Elaine is 7 years older than Jane. Their combined age is 23. How old is Elaine?
x + x + 7 = 23
2x + 7 = 23
2x + 7 - 7 = 23 - 7
2x = 16
2x/2 = 16/2
x = 8
x + 7 = 15, Elaine is 15.
56
complete the table and graph for the formula Y = 2x
x 0 1 2 3 4 5 6 7 8 9
Y
Y = 2x, so multiply each number in the x line by 2 to get the Y line.
x 0 1 2 3 4 5 6 7 8 9
Y 0 2 4 6 8 10 12 14 16 18
