Answer:
n = 2.8
Step-by-step explanation:
We need to solve the equation 5n+7 =21 to find the value of n.
Adding -7 on both sides
5n +7 -7 = 21 -7
5n = 14
Dividing both sides by 5
5n/5 = 14/5
n = 14/5
n = 2.8
Answer:
From prove
Step-by-step explanation:
from prove
Explanation
Two angles are called complementary when their measures add to 90 degrees
Answer:

Step-by-step explanation:
we know that
Applying the law of sines in the triangle ABC

substitute the given values

Solve for b


Answer:
Choice B and Choise C.
Step-by-step explanation:
Equivalent expressions are those expressions that have the same value but they look different.
Given the following expression provided in the exercise:

You need to remember the multiplication of signs in order to find the equivalent expressions:

Then:
- Eliminating the parentheses, you get this equivalent expression:

- Since the mulplication of two negative signs gives yous a positive sign, you can rewrite the original expression in this form:

This is an equivalent expression to 