A variable needs to be eliminated to solve the system of equations below. Choose the correct first step.
3x – 4y = -43
- 4x 4y = -36
Subtract to eliminate y.
Subtract to eliminate x.
Add to eliminate x.
Add to eliminate y.

In the equations, a and b represent the price per night for a room in hotel a and hotel b, respectively, w weeks after september 1 last autumn. what was the price per night in hotel a when it was equal to the price per night in hotel b? a = 240 − 20w b = 320 − 30w

What is [tex] {7}^{98 + \sqrt{4} } - 3 \times (64 \div 2 + 4 - 36) \times a = a + 36[/tex]?

An objects motion is described by the equation d= 4sin (pi t) what will the height of the object be at 1.75 seconds?