The population, in millions, of a city t years after 1990 is given by y = 2.6 + 0.08t.
A) 2.6 million is the population of the city in 1990 and 0.08 million is the increase per year
population.
B) 2.6 million is the population of the city in 1991 and 2.68 million is the population in 1974
C) 0.08 million is the population of the city in 1990 and 2.6 million is the increase per year m e
population
D) 2.6 million is the population of the city in 1990 and 0.08 million is the decrease per year in the
population

d i think its be im not sure

Step-by-step explanation:

60

step-by-step explanation:

(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