Question 1 of 8 Andrew bought a new computer for $2,100. The value of the computer decreases by 30% annually. Let y represent the value of the
computer after x years.
Which type of sequence does the situation represent?
The situation represents a geometric sequence because the successive y-values have a common ratio of 0.3.
a
The situation represents an arithmetic sequence because the successive y-values have a common difference of 30.
The situation represents an arithmetic sequence because the successive y-values have a common difference of 0.3.
o
The situation represents a geometric sequence because the successive y-values have a common ratio of 0.7.

x equals 1

step-by-step explanation:

f(4)=f(×)

x=1

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240