Evaluate the following expression if a = -6, b = 2/3 and c = -5.5 : -ab - ac

-29

Step-by-step explanation:

-ab-ac

= -(-6)(2/3)-(-6)(-5.5)

=4-33

= -29

-29

Step-by-step explanation:

-ab - ac

a = -6, b = 2/3 and c = -5.5

Substitute these values into the equation

- (-6) * 2/3 - (-6) (-5.5)

Negative negatives are positive

6 *2/3 +6(-5.5)

Multiply and divide

4 -33

Add and subtract

-29

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.

it is 10.6 according to my calculations