24. The natural numbers are "closed under addition," meaning that if you add two natural
numbers together, your answer will be a natural
number. For each number type below, state
whether it is closed under subtraction (yes or
no). If it is not provide a counter-example:
a) natural numbers
b) integers
c) rational numbers
d) irrational numbers

Cumulative examcumulative exam active13time remaining02: 44: 18the graph represents the data cost for monthly internetservice for a cell phone.which function, c(x), represents the monthly cost in dollarsin terms of x, the number of gigabytes used in a month? cell phone internet service(15,5x + 10150,0sx522 < x < 664x115, osx< 25x + 20, 2< x< 650, 65815%,monthly cost (s)20x + 5| 50x,0 < x < 22 < x < 664x( 15x, osx< 2c(x) = 5x + 10, 2< x< 6150x, 65 x5+1234 5 6 7 8 9 10 11 12gigabytes used

Luke wants to reduce the area of his rectangular garden by 1/4 the expression 14/w can be used to represent this change. what is another way to write this expression?

Factor the polynomial. b^2 + 4b + 4