Add 2 2 and 4 4. Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor.

Solve an equation, inequality or a system.

Free math problem solver answers your algebra homework questions with step-by-step explanations.

Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more.

2x-y=4 Geometric figure: Straight Line Slope = 2 x-intercept = 4/2 = 2 y-intercept = 4/-1 = -4.00000 Rearrange: Rearrange the equation by subtracting what is to the right of the equal ...

Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor.

x^{2}-x-6=0 -x+3\gt 2x+1 ; line\:(1,\:2),\:(3,\:1) f(x)=x^3 ; prove\:\tan^2(x)-\sin^2(x)=\tan^2(x)\sin^2(x) \frac{d}{dx}(\frac{3x+9}{2-x}) (\sin^2(\theta))' \sin(120)

In going from r+2y=4 to (r+2y)^2=16 you squared both sides, which adds extraneous solutions. After all, you added r+2y=-4 to the solutions. To be precise, you squared at the wrong time.

Raise 2 2 to the power of 4 4. Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just …

What is the answer to 2(y+4)=22 ? The answer to 2(y+4)=22 is y=7; Solve for y: 2(y+4)=22; The solution is y=7