CPCTC?
Corresponding Parts of Congruent Triangles that are congruent
When?
Used when you are trying to prove that 2 triangles, sides, or angles are the same.
Answer:
w(-4.2) = 3(-4.2) -1 = -12.6 - 1 = -13.6
Step-by-step explanation:
The w(-4.2) is your t so you substitute it in your expression which means you get 3(-4.2) -1 and that gives you -13.6.
Answer:

Step-by-step explanation:
We have to determine which trigonometric ratio to use, depending on what is displayed for us, and we will be using the <em>cotangent</em><em> </em>[or <em>tangent</em>] ratio, however, aside we are solving for an <em>angle</em><em> </em><em>measure</em>, we must use the inverse:

Extended Information on Trigonometric Ratios

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Answer:
(a) 2% (b) 15
Step-by-step explanation:
(a):
80 - blue (32%)
60 - white (24%)
50 - red (20%)
45 - black (18%)
10 - silver (4%)
Total: 245
5 - other (2%)
(b):
60 - white
45 - black
Difference: 15