10 points! its very simple, i just need to know if its addition or subtraction:
alyssa has to read some books for school. alyssa read 1 2/3 books on tuesday, and 1 5/6 books on monday. what fraction of these books has alyssa read?

Find the value of the variable and the length of each secant segment.

Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. a vending machine will only accept coins weighing between 5.48 g and 5.82 g. what percentage of legal quarters will be rejected? round your answer to two decimal places.

The approximate line of best fit for the given data points, y = −2x − 2, is shown on the graph.which is the residual value when x = –2? a)–2 b)–1 c)1 d)2