9. Con 12 libros de diferentes autores, cuántas selecciones de 7 libros se pueden hacer si:

a. Un libro determinado se incluye siempre.

b. Un libro determinado nunca se incluye.​

The value √10 and √15 are plotted on the number line

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny

You spin the spinner shown below once. each sector shown has an equal area. what is p(beaver ) p(beaver)? if necessary, round your answer to 2 2 decimal places.