If there are 27 posts, then there are (n - 1) total spaces between the posts . . . 27 - 1 = 26 total spaces (since there has to be a post at each end of the line)

Here's an example of 7 posts equally spaced . . . so you can see there are one less spaces between posts than there are posts (i.e. 6 total spaces between 7 posts) . . .

[] . . . [] . . . [] . . . [] . . . [] . . . [] . . . []

27 posts = 27*(10cm) = 270 cm = 2.7m
26 spaces = 26*(30m) = 780 m

Length of Fence = L = 780m + 2.7m = 782.7m

6 0

4 years ago

Which expression is equivalent to 5(4x+3) - 2x

Troyanec [42]

Good evening

Answer:

18x + 15
3(6x + 5)

Step-by-step explanation:

Unfortunately you didn’t provide the expressions to chose from ,however we can get other expressions From this one like this:

5(4x+3) - 2x = 20x + 15 - 2x

= (20x - 2x) + 15

= 18x + 15

we can also write 18x + 15 = 3×(6x) + 3×(5x) = 3(6x + 5)

then

these two expressions :

18x + 15
3(6x + 5)

are equivalent to 5(4x+3) - 2x

__________________________________________

6 0

4 years ago