<span>−1 1/3 - 1/6
= -1 2/6 - 1/6
= (-1 2/6) + (-1/6)
= -1 3/6
= -1 1/2</span>
C
Trinomial means three parts
A and C or trinomial's but the degree on a is at three and the degree of C is a one
Answer:
AC = 18
Step-by-step explanation:
Using the cosine ratio in the right triangle and the exact value
cos30° = 
, then
cos30° = 
= 
= 
= ( cross- multiply )
2 AC = 12
× = 12 × 3 = 36 ( divide both sides by 2 )
AC = 18
Answer:
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Math you do in your head
example you can do 10 tiemes 3=30 in your head
that is mental math
you might have a hard time doig 19 times 23 so you would use a calulator then it would not be mental math
it's helpful if at the supermarket or at a resaurant
mental math is math done in the mind
