Keiko sold 3 less than three-fourths of his sister’s sales. Which expression represents what Keiko sold? 3/4x - 3
3/4x + 3
3x + 3/4
3x - 3/4

An algebraic expression is an expression obtained by a finite number of the fundamental operations of algebra upon symbols representing numbers.

Three-fourths is denoted by

Let sales of Keiko's sister be

Also, Keiko sold less than three-fourths of his sister’s sales.

So, an expression that represents what Keiko sold is given by  

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54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.

answer: 80,000

step-by-step explanation:

the population doubles every day.

10,000*2=20,000 day 4

20,000*2=40,000 day 5

40,000*2=80,000 day 6