Guys how to IIdentify a rational and not rational expressions and why?

When is secxtanx equal to 0

For lunch, you must choose a sandwich, a piece of fruit, and a drink. your choices include a ham sandwich, tuna sandwich, or cheese sandwich; an apple or an orange; and skim milk, whole milk, fruit juice, or bottle water.

there are 40 questions on the STAAR test. Denise answers 36 correctly. What percent did she answer correctly?

The product of the polynomials (2ab + b) and (a2 - b2) is. If this product is multiplied by (2a + b), the result is a polynomial with terms.

Suppose g (m) varies inversely with M and g (m) = 3.5 when m=10. what is the value of M when g (m) = 5?

What's 67890 + 5336882

What are the zeroes of f (x) = (x-1) (x+1) ?

Along thid river at wich two aproximate altitude ranges are tge gradients the steepest

You go out to eat and your bill comes to $123. The GST is 5% and you leave a 15% tip. How much would it cost altogether?

Approximately 33,500 citizens of the country died in automobile accident in 2015. Express the toll in deaths per day