Choose the equation that is equivalent to this statement:
4 is 80% of x
a)4x=0.8
b)4=0.8x
c)4⋅0.8=x
d)x/4=80/100

Jack lives on a farm and has a large backyard. the area of his rectangular backyard is of a square mile. if the width of the yard is of a mile, what fraction of a mile is the length of the rectangular backyard?

Si la base de un triángulo isósceles mide 70 m y el ángulo opuesto a ésta mide 58°; entonces ¿cuánto mide la altura de dicho triángulo? a) 21.87 m. b) 40.01 m. c) 43.74 m. d) 63.14 m.

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20