Na calculadora, apertei algumas teclas. Depois, pressionei tres vezes a tecla =, e apareceu a sequência:

420

a-) Quais teclas apertei inicialmente?

b-) Se eu apertar mais três vezes a tecla =, que números aparecerão?

the expected value of the random variable : 0, 1 and 2

step-by-step explanation:

4x and 6y

im not sure though

the smallest possible measurement of the width is 14 feet

step-by-step explanation:

let's assume length of parallelogram is 'l'

width of parallelogram is 'w'

the perimeter of a parallelogram must be no less than 40 feet

so, we get

we are given

length of parallelogram is 6 feet

so,

l=6

we can plug it

now, we can solve for w

subtract both sides by 12

divide both sides by 2

and we get

so,

the smallest possible measurement of the width is 14 feet