Test 5, Unit 4 (4.16 - 4.33) Flashcards
-6
+(-9)
-15
+5
x(-4)
-20
+36 divided by +12
3
- 11
- (-18)
7
-9
x(-8)
72
45 divided by -5
-9
15
-(+7)
8
31
+(-8)
23
(12x3)(3xy2)
36x4y2
(40m3n) divided by (5m)
8m2n
square root of 100
10
33
27
25
32
negative square root of 49
-7
_+_square root of 64
_+_8
252
625
square root of 81
9
square root of 1,225
96
4x + 6 = 34
4x + 6 - 6 = 34 - 6
4x/4 = 28/4
x = 7
x/4 = 8 * 3
x/4 = 24
4 * x/4 = 24 * 4
x = 96
2x2 + 3x2
5x2
3y3 + 2x2y + 4x2y + 5y3
8y3 + 6x2y
4a2b - 2ab + 4ab - ab - 3a2b
4a2b - 3a2b + 4ab - 2ab - ab
1a2b + 1ab
write this as:
a2b + ab
m3 + m2 + 2m2 - m3
3m2
x2 + 2x2 - 12 - 15
3x2 - 27
x = 8 + 5
x = 13
3x = 15
3x/3 = 15/3
x = 5
x/5 = 12
5 * x/5 = 12 * 5
x = 60
4x - 6 = 2x + 10
4x - 2x - 6 = 2x - 2x + 10
2x - 6 + 6 = 10 + 6
2x = 16
x = 8
.3x = 18
.3x * 10 = 18 * 10
3x = 180
3x/3 = 180/3
x = 60
The principle square root of 144 is -12
F
A negative number plus a negative number is a positive number
F
The cube root of 8 is 2
T
The algebraic expression 3x2 - 6 can be read as six less than three times x squared
T
In /25 (the square root of 25) , the 25 is called an index
F
The square root of 17 is an irrational number
T
Only whole numbers are rational numbers
F
x5 means x + x + x + x + x
F
The number -13 is greater than -15
T
The absolute value of -8 is 8
T
multiply 6x by 3x3y
18x4y
find the positive square root of 196
14
divide -18 by 3
-6
write the absolute value of -9
9
divide y5 by y7
1 over y2
write the number of terms in 6x2y + 2xy + 8
3
Add +5 and -5
0
Evaluate 4x3 + 6xy if x is 2 and y is -4
4(23) + 6(2)(-4) =
4 (8) + 12(-4) =
32 + (-48) =
-16
Evaluate 3abc if a = 6, b = -4, c = 0
3(6)(-4)(0) =
0
Evaluate x2 - y2 if x = -4 and y = .5
(-4)2 - (.5)2 =
16 - .25 =
15.75
A certain number plus 8 equals 24. What is the number?
x + 8 = 24
x + 8 - 8 = 24 - 8
x = 16
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
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
Three times a certain number is 21. What is the number?
3x = 21
3x/3 = 21/3
x = 7
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.
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
