Own work. A small cuboid box has a rectangular base of length 3x cm and width x cm, where x>0. The height is y cm, where y>0. The sum of the length, width and height is 20 cm. [9 marks]
Write down an expression for y in terms of x. [1 mark]

The volume of the box is V cm^3. Find an expression for V in terms of x.

Find dv/dx

Find the value of x for which V is a maximum ​

Amaple syrup producer records th amount of sap collected from each of his trees. the line plot shows the results for one day. what is the least amount of sap any one tree produced?

Prove the divisibility of the following numbers: 25^9 + 5^7 is divisible by 30.also, read as (25 to the power of 9) + (5 to the power of 7) is divisible by 30. blank x 30what is the blank? ( it should be expressed in exponent form)

Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?