A man cycling along the road noticed that every 12 minutes a bus overtakes him and every 4 minutes he meets an oncoming bus. If busses all travel at the same constant speed and are 'equally spaced out', and the cyclist travels at his constant speed, what is the time interval between consecutive buses

answer: 1) twenty-seven times y

              2) twenty-seven multiplied by y

answer: .64

step-by-step explanation

set up the formula for standard deviation for this set of numbers, then simplify

the answer is 489

step-by-step explanation:

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116