b) 3x – 14 + 4x = 30 + 5x
c) 2x + 6 = -x + 10 + 3x – 4
Answer:
A) Any value of x makes the equation true. All real numbers Interval Notation: (−∞,∞)
B) Isolate the variable by dividing each side by factors that don't contain the variable. x = 22
C) Any value of x makes the equation true. All real numbers Interval Notation: ( −∞,∞)
A and C are identities and have infinite solutions, while B is neither, and has one solution.
Step-by-step explanation:
Step-by-step explanation:
-2x+5x-9x+6x=20-4-16
-3x=0
x=0+3=3
Answer: 384 in²
Step-by-step explanation: Surface area is the sum of the areas of all of the faces of a three-dimensional figure.
So to find the surface area of a cube, it's important to understand that each face of a cube has the same area. So we can simply find the area of one face of a cube and multiply it by the number of faces which is 6.
To find the area of one face of a cube, we can use the formula for the area of a square.
Area = S²
Since the length of a side is 8 inches, we have (8 in.)² or 8 inches x 8 inches which gives us 64 in.².
Now, since there are 6 sides to a cube, we have (64 in.)² (6) which is equal to 384 inches².
Therefore, the surface area of the cube is 384 in².
Answer:
22.7
Step-by-step explanation:
8*8.5=68
68/3
22.7
ta da
Step-by-step explanation:
57iee873jdbfbfburr893883