A soma das idades de Joaquim e Lúcio é 60 anos. sabendo que a idade de Joaquim é o triplo da idade de Lúcio, qual é a idade de cada um deles?​

50 ! pls ! 12.  building codes regulate the steepness of stairs. homes must have steps that are at least 13 inches wide for each 8 inches that they rise.

a. discuss how to find the slope of the stairs.
b. describe how changing the width or height affects the steepness of the stairs.

Write two subtraction equations that are equivalent to 5 + 12 = 17.

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?