Which of the following is a measurement of an object's mass? A)10 centimeters
B)10 kilograms
C)10 newtons
D)10 grams per cubic cm

well i think it would be use a balance

Explanation:

The answer is B) 10 kilograms.

Explanation:

This answer is correct because the kilogram is the basic unit of mass. Choice A would be incorrect because 10cm is a measurement of length, Choice C would be incorrect because 10 newtons is a measurement of force, and Choice D would be incorrect because 10 grams/cubic cm is a measurement of volume.

substitute y = 2x - 4 to x + 2y = 12:

x + 2(2x - 4) = 12     use distributive property

x + (2)(2x) + () = 12

x + 4x - 8 = 12     add 8 to both sides

5x = 20     divide both sides by 5

x = 4

put the value of x to the first equation:

y = 2(4) - 4

y = 8 - 4

y = 4

is it multiple