Sabe-se que f é uma função de proporcionalidade direta e que f(1)=4. Qual é a constante de proporcionalidade?
Nota: Escreve apenas o valor numérico.

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

Me! last question, and i'm stuck! write the algebraic expression that models the word phrase. the product of 2 divided by the number h and 8 more than the number k

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?