6y^2-7y-3-2y^2+9y+7 (pretend that you're multiplying -1 to 2y^2-9y-7 which is why 9y and 7 are positive now).
Now you're able to simplify your problem, so...
6y^2-2y^2= 4y^2
-7y+9y= 2y
-3+7=4
4y^2+2y+4
Might want to check my math but that's how you do it.
12
The shape has 12 lines of symmetry because you add
up all the sides
Hi,
Work:
Equation;

1. Write division as fraction.

2. Evaluate the power of 10².

3. Reduce the fraction with 20.

4. Multiply.

5. Finally subtract and RESULT.

Hope this helps.
r3t40
Answer:
The trend line is N = -2M + 110
Step-by-step explanation:
Answer: $18.75
Step-by-step explanation:
1 - 3/8 = 5/8
12 x 5/8 = 7.5
7.5 x 2.5 = 18.75