Which quantity is proportional to 20⁄5? check all that are true. 100⁄25 10⁄2 60⁄15 40⁄2 4⁄1

Factorize: x^2+8x+10 i just solved it but i don't know if the process is correct

During a bike challenge riders have to collect various colored ribbons each 1/2 mile they collect a red ribbon each eighth mile they collect a green ribbon and each quarter mile they collect a blue ribbion wich colors of ribion will be collected at the 3/4 markrer

The ratio of the perimeters of two similar triangles is 4: 3. what are the areas of these triangles if the sum of their areas is 130cm2?