Answer:
D
Step-by-step explanation:
a=
4
a=4
Answer:
She subtracted the two 10x's where instead you're supposed to add them together.
Step-by-step explanation:
While “digital” commonly refers to electronics in general, the scientific definition of digital is much different. “Digital” in information science refers to the finite, discontinuous phenomenon (e.g., on or off states in a light bulb) as opposed to infinitely varying, continuous analog phenomenon (e.g., the brightness of daylight). It can also refer to representing data in figures as opposed to data represented in pictorial form.
Inequalities are used to compare unequal expressions.
The actual comparison is:
or 
The temperatures are given as:

From the above list, we have:


By comparison,
or 
Using absolute values, the inequalities are:
or 
Hence, the actual comparison is:
or 
Read more about inequalities and absolute values at:
brainly.com/question/24797699