Answer:
The variable "a number" stands for 9.
Step-by-step explanation:
Rewrite the problem as 2 * (6 + x) = 30
Divide 30 into 2. 30/2 = 15
That means that the variable that is added to 6 must make the number 15.
15 - 6 = 9
The variable x is 9 so the equation would be:
2 * (6 + 9) = 30
12 x 12 x 12 = 1728
6 x 6 x 6 = 216
8 x 8 x 8 = 512
216 +512 = 728
1728 - 728 = 1000
cube root of 1000 = 10
cube is 10 cm
Answer:
13
Step-by-step explanation:
-(-5) + 8
5 + 8
13
