~PLS HELP WILL MARK BRAINLIEST~

Choose ALL that correctly solve for x.

x = 8 given that 1/2x+6=10
x = 6 given that 1/4x-1/2=2
x = 12 given that 2/5x+1/5=9
x = 10 given that 3/2x-4=11

Marcus needs to rewrite f(x) = x2 + 6x + 4 in vertex form.

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.