1. 6x-15
2. 18x-55
3. 7.2x+2.3y-2
The plane speed in still air is the average of the two speeds: 430 miles/hour.
The wind speed is half the difference of the two speeds: 20 miles/hour.
Answer:
320√2
Step-by-step explanation:
4 * 8√200
= 4 * 8√2√100
= 32 * √2 * 10
= 320√2
Although you didn't provide any answer choices:
A trinomial is an expression with exactly three terms that can't be combined an example would be this
x^2 - 3x + 1
None of those terms can be combined
x^2 + 3 - 4 has three terms but it isn't considered a trinomial because you can simplify it to x^2 - 1 which is known as a binomial because it has 2 terms in it's simplified form.
hope this helps C:
