a body moves with an initial velocity of 30m/s and accelerates uniformly until it attains the velocity 8m/s. it then continues at that velocity for some time and accelerates uniformly to rest. the total time taken for the journey is the 40s and the total distance travelled is 2550 km. if the time spent accelerating is half that of travelling at constant velocity calculate velocity, calculate the acceleration

i can't solve unless i know what the line is

step-by-step explanation:

welcome to/p>

answer:

your answer is: c. 196 7/8 in^3.

(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