<h2>
45</h2><h2>___________________________________</h2>
1: positive
2: negative
3: positive
4: negative
:)))
Answer:
E. (7,-2)
Step-by-step explanation:
Answer:
A and B
Step-by-step explanation:
Since these both only have one term and number/variable, making it a monomial.
Solution: The missing reason in Step 8 is substitution of
.
Explanation:
The given steps are used to prove the formula for law of cosines.
From step 5 it is noticed that our equation is
..... (1)
From step 7 it is noticed that the value of
is
.
So by substituting
for
in equation (1) we get the equation of step 8, i.e.,

Hence, the missing reason in Step 8 is substitution of
.