Sing
kir
b
2.1: Warmer and Colder
1. Complete the table and draw a number line diagram for each situation.
start (°C) change (°C)
final (C)
addition equation
al +40 L 10 degrees warmer
+50
40 + 10 = 50
+40
5 degrees colder
+40
30 degrees colder
+40
40 degrees colder
+40
50 degrees colder
-40-35 -30 -25-20-15-10 -5 0 5 10 15 20 25 30 35 40 45 50
LE+
0 5 10 15 20 25 30 35 40 45 50
-40 -35 -30 -25 -20 -15 -10 -5
c
d|

to ti to
0
5
10 15 20 25 30 35 40 45 50
_
L
-30 -25 -20 -15 -10 -5
0
5
10 15 20 25 30 35 40 45
x
-40 -35 -30 -25 -20 -15 -10 -5
0
5
10 15 20 25 30 35 40 45 50
-40 -35 -30 -25 -20 -15 -10 -5

Part a what is the area of triangle i? show your calculation. part b triangles i and ii are congruent (of the same size and shape). what is the total area of triangles i and ii? show your calculation. part c what is the area of rectangle i? show your calculation. part d what is the area of rectangle ii? show your calculation. part e rectangles i and iii have the same size and shape. what is the total area of rectangles i and iii? show your calculation. part f what is the total area of all the rectangles? show your calculation. part g what areas do you need to know to find the surface area of the prism? part h what is the surface area of the prism? show your calculation. part i read this statement: “if you multiply the area of one rectangle in the figure by 3, you’ll get the total area of the rectangles.” is this statement true or false? why? part j read this statement: “if you multiply the area of one triangle in the figure by 2, you’ll get the total area of the triangles.” is this statement true or false? why?

Danielle earns a 7.25% commission on everything she sells at the electronics store where she works. she also earns a base salary of $750 per week. what were her sales last week if her total earnings for the week were $1,076.25?

Im literally having a mental breakdown