What is the sum? (2/5x+5/8)+(1/5x-1/4)

a. 3/5x+1/8
b.3/5x+3/8
c.3/5x+5/8
d.3/5x+7/8

Acar with a mass of 600 kg is traveling at a velocity of 10m/s. how much kinetic energy does it have?

The distance of a chord from the centre of a circle is 12cm and the lenght of the chord is 10cm. find the radius of the circle

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.