1. Si las edades de dos hermanos están en la razón 7 : 4, y el menor tiene 20 años, ¿Cuántos años tiene el mayor? * 35
11,4
30

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us

James adds two numbers a + b. sally adds the same two numbers but reverse the order b + a what property of addition assures us that james and sally will get the same sum

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6