ERROR ANALYSIS Describe and correct the error in finding the sum. X^3- 4x^+ 3
+-3x^3+ 8x - 2
-2x^3 + 4x^+ 1

The sum of 3 and 2 is not 1.

The sum of x' and 3x is not 2x} .

The terms x and
3x are not like terms and cannot be added.

• The terms - 4x2 and 8x are not like terms and cannot be added.

The correct answer is

The answer is, the streetlight is 18 inches tall.

Planet earth has a mass of 5.9726x10²⁴ kg.then: 5.9726x10²⁴ kg=100% of the total earth mass.if the water´s mass=5x10-4 % of the total mass, we can solve this problem by the rule of three.5.9726x10²⁴ %*10⁻⁴ %x=(5.9726x10²³ kg)(5*10⁻⁴  %) / 100 %=2.9863x10¹⁹ kganswer:   the mass of the planet´s water would be   2.9863 x 10¹⁹ kg.