Answer:
negative 21/9 times negative 18/7 is 6
Step-by-step explanation:
The phrase negative 21/9 times negative 18/7 can be written mathematically as

Lets first convert the fractions into decimal values
= -2.33
= -2.57
Now on simplyfying
=>
=> 5.988
=>6 (rounding off)
We will get a positive value because the multiplicative law states that the product of two negative number is positive
V = l * w * h
240 = 20* h
divide both sides by 20
12 = h
height = 12 inches
Answer: 2 or more.
X and Y could be anything, so there are at least two answers