ACT Practice 1
Flashcard
•
Mathematics
•
11th Grade
•
Practice Problem
•
Hard
+6
Standards-aligned
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the least common multiple (LCM)?
Back
The least common multiple (LCM) of two or more integers is the smallest positive integer that is divisible by each of the integers.
2.
FLASHCARD QUESTION
Front
How do you find the LCM of 3, 5, and 6?
Back
To find the LCM, list the multiples of each number: Multiples of 3: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30...; Multiples of 5: 5, 10, 15, 20, 25, 30...; Multiples of 6: 6, 12, 18, 24, 30...; The smallest common multiple is 30.
3.
FLASHCARD QUESTION
Front
What is the slope of a line perpendicular to a given line?
Back
The slope of a line perpendicular to another line is the negative reciprocal of the slope of the original line.
Tags
CCSS.8.EE.B.6
4.
FLASHCARD QUESTION
Front
How do you find the slope of the line 3x + 2y = 19?
Back
Rearranging to slope-intercept form (y = mx + b): 2y = -3x + 19; y = -3/2x + 19/2. The slope (m) is -3/2.
Tags
CCSS.8.EE.B.5
5.
FLASHCARD QUESTION
Front
What is the slope of the line perpendicular to 3x + 2y = 19?
Back
The slope of the line perpendicular to -3/2 is 2/3.
Tags
CCSS.8.EE.B.5
6.
FLASHCARD QUESTION
Front
What percentage of students come from families with only one child if 30% do?
Back
If 30% of students come from families with only one child, then 100% - 30% = 70% do not.
7.
FLASHCARD QUESTION
Front
How do you calculate the number of students not from families with only one child?
Back
If there are 7,340 students and 30% come from families with one child, then 70% do not: 0.70 * 7340 = 5,138.
Tags
CCSS.6.RP.A.3C
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