A race track is made from two straights and two semicircles. The straights are 80m long. The race track has a total perimeter of 400m. Calculate the distance, d, between the two straights.

76.4 m

Step-by-step explanation:

The race track has two straights and two semi circles.

Each straight is 80m

total perimeter for the straights is 80 * 2 = 160m

two semi circles which creates a full circle

perimeter of a full circle = d

NB : (d) is the diameter

therefore we can find the value of the diameter

400 = 160 + d

400- 160 = d

240 = d

d = 240/

d = 76.394.....

d = 76.4 m

2(2x + 3) = -4 + 2(2x + 5)

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 6

4x - 6 + 6 = 4x - 6 + 6

4x = 4x

x = x

unlimited solutions.

here is a big fat