Hank is solving equations containing square or cube numbers. He writes 4 equations
on his paper, but his mom says only 1 of the 4 equations is correct as written
Equation #2
Equation #1
23 = 64
P = 764
ſz? = √
z= 1
Equation #4
Equation #3
23 = 12
* = 49
VI? = 49
z? = 7
Which is the correct equation?
O
Equation 1
O
Equation 2
O
Equation 3
O
Equztion 4

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.

there is only one way to arrange all the eight relative to each other because they are not distinct. we have

now there are nine places to place an (and not more than one in one place).   because we have four symbols, we need to choose four of these nine places to insert an . order does not matter because the are not distinct.

thus there are 1 · c(9,4) ways, or, if we calculate it,

thus there are 126 ways to form such "words."

the anwser is x< -17/2