The math department is putting together an order for new calculators. The students are asked what model and color they prefer.
Model 55 Model 66 Model 77 Total
Black 0.10
0.40
0.30
0.80
Silver 0.03
0.07
0.10
0.20
Total
0.13
0.47
0.40
1.00
Which statement about the students' preferences is true?
A. More students prefer black Model 77 calculators than silver Model
66 calculators.
B. The fewest students prefer black Model 55 calculators.
C. More students prefer Model 55 calculators than Model 66
calculators.
D. More students prefer silver calculators than black calculators.

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb

step-by-step explanation:

∆abc has the points a(1, 7), b(-2, 2), and c(4, 2) as its vertices. formed with the point d(1, 2) as its third vertex, then ∆abd is triangle.

answer

the correct answer is

explanation

the given function is

the excluded values are obtained by solving:

we factor to obtain:

the excluded values are

l.jnl.j/n.m,lm,

step-by-step explanation: