Thea builds the first layer of a rectangular prism using 4 unit cubes raj adds 4 more layers how many unit cubes are used?

20 unit cubes were used.

Step-by-step explanation:

Thea builds the first layer of a rectangular prism with 4 unit cubes.

Raj added 4 more layers so total five layers were there to build a new prism. Now we have to calculate total number of cubes used.

By unitary method

∵ One layer of rectangular prism used number of cubes = 4

∴ 5 layers of prism will use cubes = 5×4 = 20 unit cubes

Total 20 unit cubes were used.

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204

b. would be the answer : )

step-by-step explanation:

step 1: add -16x to both sides.

16x−4y+−16x=64+−16x  

−4y=−16x+64

step 2: divide both sides by -4.

−4y /-4 = -16x + 64/-4

answer:   y=4x−16

hope i'm right