The number of unwatched shows in Sylvia's DVR is 85. This number grows by 20 unwatched shows per week. The function N(t) = 85 + 20t represents the relation between the number
of unwatched shows, N, and the time, t, measured in weeks. Find the value for N(4).
105
165
115
100

answer: 48

just remember to use pemdas:

parentheses

expressions

multiplication

division

addition

subtraction

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct