I think is 4000 because when it's sad 1 singnificant figure you have to round the first name which 4
Answer:
12x^2-4x
Step-by-step explanation:
5x + 4x^2 - 9x + 8x^2
Combine like terms
4x^2+8x^2+5x-9x
12x^2-4x
The angle T1PT2 is 65-37=28 degree
use law of sine: sin37/PT2=sin28/7370, PT2=7370*sin37/sin28
Use a calcuator, I got the answer 9448
B. sin65=PA/PT2, PA=PT2*sin65=9448*sin65=8563
Given:

To find:
The product of the expression.
Solution:

Take out -4 as a common factor in Last two terms.

Make sure the terms in both brackets must be same.
Take out common factor (2y - 5) from both terms.

4 can be written as 2².

Using the identity: 
.
The product is
.