1.(07.02 MC) The lengths of three sides of a trapezoid are shown below:
Side 1: 1622 – 42 + 2
Side 2: -22 + 21 + 722
Side 3: 2 - 3z + 1822
The perimeter of the trapezoid is 1773 + 6022 + 2z - 5.
Part A: What is the total length of sides 1, 2, and 3, of the trapezoid? (4 points)
Part B: What is the length of the fourth side of the trapezoid? (3 points)
Part C: Do the answers for Part A and Part B show that the polynomials are closed under add
(10 points)

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step-by-step explanation:

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step-by-step explanation:

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m