12.a road has a white line painted on each edge, and a dashed line down the middle. if every 10 m section of the road has eight 650 mm long hashes down it’s centre, calculate the total length of paint required (in kilomotres) for a 10 km road.
can someone give me the solution and answer . tysm

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (–4, 0) and (6, 0). the y-intercept of the first parabola is (0, –12). the y-intercept of the second parabola is (0, –24). what is the positive difference between the a values for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth

Prove the converse of the pythagorean theorem using similar triangles. the converse of the pythagorean theorem states that when the sum of the squares of the lengths of the legs of the triangle equals the squares length of the hypotenuse, the triangle is a right triangle. be sure to create and name the appropriate geometric figures.