E:-6=3:9 what is the blank

There are 9 students in a class. The teacher chooses 2 students to go to the library. The order in which they are chosen does not matter. How many ways are there to choose the students?

Consider each equation. Is the equation of a line that is parallel or perpendicular to y=3x+2? Select yes or no for A-C.

1/3 (2x+3) - 1/5 (x+6) = 4

Mrs. Govin is making cakes for the school bake sale. She needs 2 cups of sugar for every cake she makes. Is the total number of cakes Mrs. Govin makes proportional to the number of cups of sugar?

Julian needs a board that is 1 foot long. His measuring tape is 1/4 of a foot long. how many times will Julian need to use his measuring tape to measure 1 foot?

Jane is 3 years older than mary, and mary is twice as old as kay. if kay is x years old, how old is jane?

Which expression is equivalent to 1.7 - 0.5 (0.2x - 1.6) ? A) 2.5 - 0.1x B) 0.9 - 0.1x C) 0.1x - 0.9 D) 0.1x - 2.5

A ray of light strikes a flat block of glass (n = 1.52) of thickness 1.50 cm at an angle of 36.0° with the normal. Trace the light beam through the glass, and find the angles of incidence and refraction at each surface.

A tree 7 ft. tall grows an average of 6in. each year. Which equation models the tree's height h after x years?

Korey is planning to open a comic book store. He has developed the following expense breakdown for set-up and operation for the first year. Korey has $8,500 in savings and $25,000 in inheritance money to use to open his store.