Answer:
The diameter is 2 times the radius.
D=2r
Substitute 20 as the diameter and solve for r.
20=2r
Divide both sides by 2.
10=r
So, the radius is 10 centimeters.
:)
Answer:
<h2>x = -4 or x = -2</h2>
Step-by-step explanation:

Answer:
D
Step-by-step explanation:
R(x) = -x^2+122x+400
Answers are:
-15<span>°F
-78</span><span>°C
</span>23<span>°C
</span>199<span>°F</span><span>
</span>