There are 90 fith-grade students going on a feild trip. each student gives the teacher $9.25 to cover admission to the theater and for lunch. admission for all the students will cost $315, and each student will get an equal amount to spend on lunch. how much will each fifth grader get to spend on lunch?

they each get $5.75 for lunch

Step-by-step explanation:

9.25 x 90 students = 832.50

832.50 -315 = 517.50

517.50 / 90 = 5.75

step-by-step explanation:

there is only one way to arrange all the eight relative to each other because they are not distinct. we have

now there are nine places to place an (and not more than one in one place).   because we have four symbols, we need to choose four of these nine places to insert an . order does not matter because the are not distinct.

thus there are 1 · c(9,4) ways, or, if we calculate it,

thus there are 126 ways to form such "words."