4a^2+7ab-b^2
Step-by-step explanation:
Add the first two equations together:
3a^2-ab-2b^2
+ 2a^2+5ab-3b^2
---------------------------
5a^2+4ab-5b^2
Subtract that answer from the remaining trinomial:
5a^2+4ab-5b^2
- a^2-3ab-4b^2
--------------------------
4a^2+7ab-b^2
Answer:
45
Step-by-step explanation:
divide 25 by 5 to see how they got that, which is 5. then multiply 9 by 5 bc you have to do the same thing, which is 45.
Answer: 17.5
Step-by-step explanation:
Answer:
<em>In the year the study began, there were </em><em>40 bears more than cougars</em><em>.</em>
Step-by-step explanation:
1. <u>Determine the number of </u><em><u>bears</u></em><u> that were in the given region when the study began.</u>
<u />
- Function: f(x) = 830(0.8)ˣ
- Start ⇒ x = 0
- Substituting: f(0) = 830 (0.8)⁰ = 830 (1) = 830
2. <u>Determine the number of </u><em><u>cougars</u></em><u> that were in the given region when the study began</u>:
- From the table, the population of cougars 0 years after the study began was 790.
3. <u>Compute the difference</u>:
- Number of bears - number of cougars = 830 - 790 = 40
Answer:
The beryllium atom; 1.99 times larger.
Step-by-step explanation:
The beryllium atom is 0.000000000112 meters, while the nitrogen atom is 0.000000000056 meters. So, the beryllium atom is larger than the other.
(1.12 * 10^-10) / (5.6 * 10^-11)
= (1.112 / 5.6) * (10^-10 + 11)
= 0.1985714286 * 10
= 1.985714286 * 10^0
So, the beryllium atom is about 1.99 times larger than the other.
Hope this helps!
