Linear equations and inequalities
solving a word problem with three unknowns using a linear
tahishwa
over the last three evenings, isabel received a total of 75 phone calls at the call center. the second evening, she received 5 fewer calls than the first evening
the third evening, she received 2 times as many calls as the first evening. how many phone calls did she receive each evening?

area = length x width

length = 2 x width

32 = 2 x width x width

32 = 2 x width^2

36 = width ^2  

width = 6

length = 12

area is 32

perimeter = 2 x 12 + 2 x 6 = 24 + 12 = 36

step-by-step explanation:

answer: you will have more water.

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."