Answer:
Richard is 22 and Teo is 9
Step-by-step explanation:
Teo's age:
31-13
=18 divided by 2
=9
Richard's age:
31-9
=22
200 flying insects she catch for her project .
<u>Step-by-step explanation:</u>
We have , Heather had to collect insects for her biology project. She was able to collect 225 total insects. She collected 8 times as many insects that could fly as insects that couldn't fly. That means insects ratio of non-fly to fly is 1:8 .
There are a total of 225 insects , and for every one non fly insect there are 8 fly insects , Let x be the number of insects that can't fly so:

⇒ 
⇒ 
⇒ 
⇒ 
⇒ 
So , Number of fly insects = 8x = 8(25) = 200 . ∴ 200 flying insects she catch for her project .
Answer:
1.254 * 10^3
Step-by-step explanation:
1254 = 1.254 * 1000 = 1.254 * 10^3
Answer:
(x−9)2+(y+11)2=25
Step-by-step explanation:
hope that helps
Answer:
The domain is all real values
Step-by-step explanation:
The domain is the set of all possible x-values which will make the function "work", and will output real y-values.
In this case, we can observe from the graph that the function is defined for all x-values. So the domain is all real values.