The area of a circle is A = πr^2. We let A1 And A2 the areas of the circles and r1 and r2 the radius of each, respectivley.
A1 + A2 = 80π
Substitute the formula for the area,
π(r1)^2 + π (r2)^2 = 80π
From the statement, we know that r2=2(r1).
<span>π(r1)^2 + π (2 x r1)^2 = 80π
</span>We can cancel π, we will have
5 x (r1)^2 = 80
Thus,
r1 = 4 and r2 = 8
Answer:
2 hours at 15mph
4 hours at 4mph
Step-by-step explanation:
So the division of a number and -9 or
x/-9
+10=11 or
(x/-9)+10=11
subtract 10 from both sides
x/-9=1
multiply both sides by -9
x=-9
Answer:
8+7=21
Step-by-step explanation:
Answer:
To identify which integer does not belong with the rest, we must first evaluate each.
Step-by-step explanation:
- [25.6...] is already evaluated. Therefore, let's move on to Integer <em>b: </em>
, where is <em>x </em>is 48.
- 48 = 2 * 24--> 2 * 12--> 2 * 6--> 2 * 3
- √48 =
* 2 * 2 * 2 * 3
- We have 1 perfect sqaure:
* 2
- When we multiply, we receive 2.
- Therefore, 2 *

- When -51/2 is relatively prime, we receive -25 1/2
- Finally, the last integer is already simplified.
Based on these results, you may determine the number that does not belong with the other three, whether than is through means of irrationability, value, absolte value, or whatever other means you decide.