The solution to the system of equations is (0,2) because it is the point at which both equations intersect.

**Answer:**

<h2>65 units^2</h2>

**Step-by-step explanation:**

Okay so you either add or multiply the ones with the same powers

-3x^4 + 5x^4 = 2x^4

+ 9x^3 (as there are no other ones with the same powers this remains the same

-4x + - 9x (adding a negative is the same as subtracting)

so - 4x - 9x = -13x

4 + - 2 = 4 - 2 = + 2

so 2x^4 + 9x^3 - 13x + 2

the answer is B

**Answer:**

18 - (-12)

**Step-by-step explanation:**

Final temp. - Initial temp. = the change in temperature

By -12, we're indicating that is below zero (which is obvious) meaning that it is not in the "normal" scale nor in the imaginary scale of numbers. So, we can operate the following...

18 - (-12) = 30

So the temperature changed by 30 values or the temperature increased by 30 values, because the number is positive.

**Answer:**

4

**Step-by-step explanation:**