After birth, a baby's weight increased at a steady rate for several weeks.
a linear model of this situation contains the values (1, 7.2) and (6, 9.2), where x represents the number of weeks, and y represents the baby's weight, in pounds.
what was the baby's weight at birth?

a.0.4 of a pound

b.5 pounds

c.7.2 pounds

d.6.8 pounds

How many zeros does the function f(x)=4x3-x2+1 have

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?

The students in a class were asked how many siblings they have. the data obtained is represented in the dot plot. the number of students who have no siblings is . the number of students who have three or more siblings is .