Carmen completed an experiment in her chemistry class with a 17% error. She calculated percent error using the formula below, where "Experimental" is Carmen's result from the experiment and "Accepted" is the textbook result.

Percent Error =
Experimental - Accepted

Accepted
× 100%

If the "Accepted" value for this experiment is 4.9 grams, which of the following could be Carmen's result for this experiment? Round to the nearest tenth, if necessary.

Step-by-step explanation:

Let the experimental value be x

Hence, experimental value is 5.7 grams.

5.7

Step-by-step explanation:

E: Experimental

(E - 4.9)/4.9 × 100 = 17

E - 4.9 = 17 × 4.9/100

E - 4.9 = 0.833

E = 0.833 + 4.9

E = 5.733

5.7 to the nearest tenth

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form