Which is a sum of cubes?

a3 + 18
a6 + 9
a9 + 16
a12 + 8

ANSWER

EXPLANATION

Consider the constants, 18,9,16, and 8.

The only number that is a perfect cube among these numbers is 8.

We can rewrite

as

Therefore the correct choice is is D.

Step-by-step explanation:

Given :

To Find : Which is a sum of cubes?

Solution :

1)

Since 18 is not a perfect cube

So,   is not a sum of cubes

2)

Since 9 is not a perfect cube

So,   is not a sum of cubes

3)

Since 16 is not a perfect cube

So,   is not a sum of cubes

4)

Since 8 is a perfect cube

Cube root of 8 is 2

=

So,   is a sum of cubes.

Hence   is a sum of cubes

connie < felicia < stew

step-by-step explanation:

stew:

we need to find the slope

m = (y2-y1)/ (x2-x1)

    = (2650-795)/(10-3)

    = 1855/7

265 words per minute

connie:

we need to find the slope

m = (y2-y1)/ (x2-x1)

we have two points (0,0) and (4,800)

m = (800-0)/(4-0)

  m = 800/4

    200 words per minute

felicia:

260 words per minute

200< 260 < 265

connie < felicia < stew