How can i solve this : -0.5(17x-24)=3.4x-6+6.3x

Which ratio is equivalent to 10: 85

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.