A number line is shown below. The numbers 0 and 1 are marked on the line, as are two other rational numbers a and b.
Decide which of the following numbers are positive and which are negative.
a - 1
Choose p for positive and n for negative and put the appropriate letter
in the blue box next to each expression,
a - 2
b
0
1
-b
a
a + b
Choose one of the expressions and explain how you knew it was positive or
negative:
a - b
ab + 1

Two corresponding sides of two similar triangles are 3cm and 5cm. the area of the first triangle is 12cm^2. what is the area of the second triangle?

3.17 scores on stats final. below are final exam scores of 20 introductory statistics students. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 57, 66, 69, 71, 72, 73, 74, 77, 78, 78, 79, 79, 81, 81, 82, 83, 83, 88, 89, 94 (a) the mean score is 77.7 points. with a standard deviation of 8.44 points. use this information to determine if the scores approximately follow the 68-95-99.7% rule. (b) do these data appear to follow a normal distribution? explain your reasoning using the graphs provided below.

The nth term of a sequence in 2n-1 the nth term of a different sequence is 3n+1 work out 3 numbers that are in bothe sequences and are between 20 and 40