Which of these numbers are composite numbers?
19, 20, 21, 22, 23

20, 21 and 22 are composite numbers

Step-by-step explanation:

20 is divisible by 2 4 5 and 10

21 is divisible by 3 and 7

22 is divisible by 2 and 11

b. 2

step-by-step explanation:

the slope of a line =δy/δx

δy= y₂-y₁

δx= x₂-x₁

therefore, using the points (-2,-3)   and (3,7) we can calculate gradient as follows:

m=(7--3)/(3--2) (a number minus a negative number the sign changes to a plus)

m=(7+10)/(3+2)

=10/5

=2

it has the same slope and a different y-intercept

hope this : )