Answer:
Step-by-step expThis is the concept of trigonometry, the value of x will be calculated as follows;
sin theta=[opposite]/[hypotenuse]
theta=x
opposite=16 units
hypotenuse=21 units
thus;
sin x=16/21
hence;
x=arcsin(16/21)
x=49.63
x=50 (to the nearest degrees)
It’s 6
since it’s right at 5 & 7
Answer:

Step-by-step explanation:

Factor out 20 from the expression.

Take 20 as common.

This graph the answer to your problem.