Which expressions are equivalent to this expression?
(CHOOSE MORE THAN ONE ANSWER)

30x2 − 5x − 10

5(2x + 1)(3x − 2)
3x(2x − 1) + 2(2x − 1)
-5(-6x2 + x + 2)
5(2x − 1)(3x + 2)
5x(6x − x − 2)
(10x − 5)(3x − 5)

The answers would be 5(2x + 1) (3x -2) and -5(-6x^2 + x + 2)

Step-by-step explanation:

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solution:

as, mean is defined as sum of all the observations divided by total number of observations.

and , median is mid value of the data whether arranged in ascending order or descending order.

consider, roadsters:

2,3,4,5,6,7,8,9

mean =

also, median= , because number of observations is even, so median is mean of two mid values.

now, coming to bandits

2,3,4,5,6

mean =  

median = 4, as number of observations is odd.

so, roadsters has greater median as well mean than bandits.

→option a is true about the repairs performed on 2 types of cars:

bandits have lower median and mean than roadsters.

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this