Answer:
-4 3/4, -4 1/2, -4 1/4
Step-by-step explanation:
extraneous root is a solution o an equation that seems to be right but when we check it (by substituting it into the original equation) it turns out not to be right
Answer:

Step-by-step explanation:
Area of circle:

By using the area of a circle, we can get the area of a semicircle:

Let's convert the mixed fraction to an improper fraction and then a decimal:
=
= 
Now, we solved for the diameter, to get the radius, we need to divide the diameter by 2:

Now we have the radius, so we can plug in our values and find the area:


Answer:
27
Step-by-step explanation:
20=v-7
v=20+7
v=27
Hence, v equals to 27