Let x be the amount invested at 10%
so the amount invested at 12 % = (8000-x)
0.1x + 0.12(8000-x) = 900
0.1x - 0.12x = 900- 960
0.02x = 60
x = 3000 @ 10%
8000 - 3000 = 5000 @ 12%
<h3>GCF for given expression is:</h3>

<em><u>Solution:</u></em>
Given that,
We have to find the greatest common factor

First find the GCF of numbers 5, 35 and 15
<em><u>Find the GCF of 5, 35 and 15</u></em>
The factors of 5 are: 1, 5
The factors of 15 are: 1, 3, 5, 15
The factors of 35 are: 1, 5, 7, 35
Then the greatest common factor is 5
Now find the GCF of variables

Here, the common factor is 
<em><u>Thus, GCF for given expression is:</u></em>

Answer:
(n+11)^2
Step-by-step explanation:
Hope this helps!
Answer:
12 centimetres
Step-by-step explanation:
I looked it up
Let x = the number of penguins we are finding
x ÷ 100 × 30 = 15
x = 15 ÷ 30 × 100
x = 50
hope this helps and have a great day :)