Unit2 Lesson1: Patterns and Expressions

dentify a pattern and find the next number in the pattern. -48, -24, -12, -6 A. -3 B. 0 C. 2 D. 3

A. -3

5 You want to set up an aquarium and need to determine what size tank to buy. The graph shows tank sizes using a rule that relates the capacity of the tank to the combined lengths of the fish it can hold. If you want four 2 in. platys, seven 1 in. guppies, and a 3 in. loach, what is the smallest capacity tank you can buy? graphA graph with horizontal axis labeled inches from left intersect point, at left parenthesis 0 comma 0 right parenthesis, to right labeled with evenly spaced positive numbers 2, 4, 6 and 8; vertical axis labeled gallons from top to bottom intersect point, at left parenthesis 0 comma 0 right parenthesis, labeled with evenly spaced positive numbers 10, 8, 6, 4 and 2. A line starts at point left parenthesis 0 comma 4 right parenthesis, and continues diagonally upward through point left parenthesis 6 comma 10 right parenthesis. A. 18 gallon B. 22 gallon C. 25 gallon D. 19 gallon

B. 22 gallon

Yesterday you borrowed $30 from your brother. Every day that you don't pay it back, you owe $2.00 more. So today, day 1, you owe him $32.00; on day 2 you will owe him $34.00; on day 3 you will owe him $36.00, etc. If you still haven't paid him back, how much will you owe him on day 22? A. $44.00 B. $660.00 C. $74.00 D. $662.00

C. $74.00

Look at the figures from left to right. What would the next figure in the pattern look like? four polygons shown side by side: a 7-sided figure or heptagon a 6-sided figure or hexagon a 5-sided figure or pentagon a 4-sided figure or square A. The image shows a rectangle. B. octagon C. triangle D. right slanted line

C. Triangle

Use the pattern to answer the question: How many line segments are in the 20th figure? |3 segments|6 segments| 9 segments| A. 80 B. 23 C. 20 D. 60

D. 60