Chemical Formulas and Compounds Determining Chemical Formulas.
Review Know all of the formulas of variations.
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Transcript of Review Know all of the formulas of variations.
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Review
Know all of the formulas of variations
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Algebra II ReviewChapter 8
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Question 1:As y varies directly with x, write an equation when y = 6 when x = 3
1. y = x2. y = 2x3. y= 1/2x4. y = 18/x5. 2y = x6. Not here
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Question 1:As y varies directly with x, write an equation when y = 6 when x = 3
1. y = x2. y = 2x3. y= 1/2x4. y = 18/x5. 2y = x6. Not here
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Question 2: As y varies inversely with the square of x and y = 1 when x = 2, what is the value of y when x = –4?
1. –22. –1/23. 1/44. 45. 166. Not here
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Question 2: As y varies inversely with the square of x and y = 1 when x = 2, what is the value of y when x = –4?
1. –22. –1/23. 1/44. 45. 166. Not here
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Question 3: The area A of a triangle varies jointly as the base, B and the height H. If A= 12 when B = 6 and h = 4, find B when A =
36 and H = 8
1. 42. 93. 64. 85. 1/26. None given
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Question 3: The area A of a triangle varies jointly as the base, B and the height H. If A= 12 when B = 6 and h = 4, find B when A =
36 and H = 8
1. 42. 93. 64. 85. 1/26. None given
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Question 4: For which values of x is the expression undefined?
1. –1/3 and 7/22. 1/3 and –7/23. 1/3 and 7/24. –1/3 and –7/25. –5/2 and 7/26. Not here
2
2
6 13 5
6 23 7
x x
x x
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Question 4: For which values of x is the expression undefined?
2
2
6 13 5
6 23 7
x x
x x
1. –1/3 and 7/22. 1/3 and –7/23. 1/3 and 7/24. –1/3 and –7/25. –5/2 and 7/26. Not here
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Question 5: The area of a rectangle is equal to 3x2 + 11x – 4. If the length of the rectangle is equal to x + 4, determine its width
1. 3x – 12. 3x + 1 3. 3x + 44. 3x + 45. x – 76. Not here
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Question 5: The area of a rectangle is equal to 3x2 + 11x – 4. If the length of the rectangle is equal to x + 4, determine its width
1. 3x – 12. 3x + 1 3. 3x + 44. 3x + 45. x – 76. Not here
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Question 6: Simplify the following,
1. 2. 5x3y2
3. 5x7y2
4. 15x6y3/2
5. 6. Not here
2 2 5
3
12 5
2 6
x y x y
xy y
5 27
2
x y
5 22
7
x y
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Question 6: Simplify the following,2 2 5
3
12 5
2 6
x y x y
xy y
5 27
2
x y
5 22
7
x y
1. 2. 5x3y2
3. 5x7y2
4. 15x6y3/2
5. 6. Not here
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Question 7: Simplify the following,
1. 4/32. (x – 4)/(x + 3)3. (x + 3)/(x + 3)4. (x + 3)(x + 4)5. (x + 4)(x – 3)6. Not here
12 216 9
3 4
x x
x x
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Question 7: Simplify the following,12 216 9
3 4
x x
x x
1. 4/32. (x – 4)/(x + 3)3. (x + 3)/(x + 3)4. (x + 3)(x + 4)5. (x + 4)(x – 3)6. Not here
Answer Now Countdown
15
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Question 8: Which of these statements below is NOT a step to add and subtract rational expressions?
1. The common denominator is needed2. The greatest common factor is taken3. The factors can be “crossed–cancelled”4. The factors must be simplified5. B and C6. Not here
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Question 8: Which of these statements below is NOT a step to add and subtract rational expressions?
1. The common denominator is needed
2. The greatest common factor is taken
3. The factors can be “crossed–cancelled”
4. The factors must be simplified
5. B and C6. Not here
Answer Now Countdown
15
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Question 9: Simplify the following,
1. 2. 3. 4. 5. 6. Not here
2 2
3 2 2
6 15 3 5
4 28 48 6 9
x x x x
x x x x x
2
3 2
2 9 9
4 16
x x
x x
2
3 2
2 9 9
4 4
x x
x x
2
3 2
2 9 9
4 16
x x
x x
2
3 2
2 9 9
4 4
x x
x x
2
3 2
2 9 9
4 16
x x
x x
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Question 9: Simplify the following,2 2
3 2 2
6 15 3 5
4 28 48 6 9
x x x x
x x x x x
2
3 2
2 9 9
4 16
x x
x x
2
3 2
2 9 9
4 4
x x
x x
2
3 2
2 9 9
4 16
x x
x x
2
3 2
2 9 9
4 4
x x
x x
2
3 2
2 9 9
4 16
x x
x x
1. 2. 3. 4. 5. 6. Not here
Answer Now Countdown
15
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Question 10: Simplify the following
1. 2. 3. 4. 5. 6. Not here
2
1 2
1 2 3 2
x x x
x x x x
22 2 1
( 1)( 2)
x x
x x
22 4
( 1)( 2)
x x
x x
22 7 4
( 1)( 2)
x x
x x
22 4
( 1)( 2)
x x
x x
2 2 4
( 1)( 2)
x x
x x
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Question 10: Simplify the following2
1 2
1 2 3 2
x x x
x x x x
22 2 1
( 1)( 2)
x x
x x
22 4
( 1)( 2)
x x
x x
22 7 4
( 1)( 2)
x x
x x
22 4
( 1)( 2)
x x
x x
2 2 4
( 1)( 2)
x x
x x
1. 2. 3. 4. 5. 6. Not here
Answer Now Countdown
15
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Question 11: Simplify the following
1. 2. 3. 4. 5. 6. Not here
23 45 3xx
(3 4)
(5 3)
x
x
2
(3 4)(5 3)x x
(3 4)(5 3)
2
x x
(5 3)
(3 4)
x
x
2
(3 4)(5 3)x x
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Question 11: Simplify the following23 45 3xx
(3 4)
(5 3)
x
x
2
(3 4)(5 3)x x
(3 4)(5 3)
2
x x
(5 3)
(3 4)
x
x
2
(3 4)(5 3)x x
1. 2. 3. 4. 5. 6. Not here
Answer Now Countdown
15