
1) Let's evaluate that expression, given that a=4.9, b=-7, and c=-0.5

Note that we have rewritten it as a fraction so that we can easily operate. Also, we have applied here the PEMDAS order of operations, prioritizing the exponents.
Answer:
1.46
Step-by-step explanation:
First find the the mean score before he made a 90.

Now add the score of 90 and calculate.

Subtract the two scores.

His mean test score increased by 1.46.
Answer:
exposed is another word for endangered
Answer:
<h2>2.2</h2>
Step-by-step explanation:
Use the cosine law (look at the picture).
We have:


→ look at the second picture
