Answer: I need points to give out for answers-
Step-by-step explanation:
Answer:
28.3 cm
Step-by-step explanation:
The formula to find the circumference is 2•π•radius. The diameter is 9 cm, so the radius is 9/2 = 4.5 cm. So, the circumference is:
2•4.5•3.14 = 28.26 ≈ 28.3 cm
<em>x = 4</em>
- Step-by-step explanation:
<em>√x-3 + √x+5 = 4</em>
<em>(√x-3)² = (4-√x+5)²</em>
<em>x-3 = 16 - 8√x+5 + x+5 | -x</em>
<em>- 3 = 21 - 8√x+5</em>
<em>- 24 = - 8√x+5 | ×(-1)</em>
<em>24 = 8√x+5 | : 8</em>
<em>3 = √x+5</em>
<em>3² = (√x+5)²</em>
<em>9 = x + 5</em>
<em>x = 4</em>
