Answer:
-2
Step-by-step explanation:
Hope you do well on your assignment!
Answer:

Step-by-step explanation:
Remember that 
Then,

But
and 
Then

Answer:8 cm by 10 cm
Step-by-step explanation:
8*2+10*2=36
8*10=80
For a line in the form:

In this case, for the line 2x + 10y = 20 with a=2 and b=10 the slope is:

Now, two lines are perpendiculars if the slopes satisfy the following equation:

So, for the line we want the slope is:

Finally, the line pass througth the point (2, 3) with slope m=5, so the equation is:

The equation of the line is y = 5x - 7