Instructions for a craft project say that the length of a piece of red ribbon should be 7inches than the length of a piece of blue ribbon. How long is the red ribbon of the length of the blue ribbon is: 10 inches? 27 inches? x inches?

When the length of the blue ribbon is 10 inches then the length of the red ribbon is 3 inches, when the length of the blue ribbon is 27 inches then the length of the red ribbon is 20 inches, and when the length of the blue ribbon is 'x' inches then the length of red ribbon is (x - 7) inches.

Given :

Instructions for a craft project say that the length of a piece of red ribbon should be 7 inches than the length of a piece of blue ribbon.

a) The length of the blue ribbon is 10 inches.

Red ribbon length = 10 - 7 = 3 inches

b) The length of the blue ribbon is 27 inches.

Red ribbon length = 27 - 7 = 20 inches

c) The length of the blue ribbon is x inches.

Red ribbon length = (x - 7) inches

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Question:

Instructions for a craft project say that the length of a piece of red ribbon should be 7 inches less than the length of a piece of blue ribbon.

How long is the red ribbon if the length of the blue ribbon is:

10 inches?

27 inches?

x inches?

a) Length of red ribbon is 3 inches

b) Length of red ribbon is 20 inches

c) Length of red ribbon is (x - 7) inches

Solution:

Given that,

The length of a piece of red ribbon should be 7 inches than the length of a piece of blue ribbon

Therefore,

Length of red ribbon = length of blue ribbon - 7 eqn 1

We have to find the length of red ribbon if the length of the blue ribbon is:

a) length of blue ribbon = 10 inches

Therefore, from eqn 1,

Length of red ribbon = 10 - 7

Length of red ribbon = 3

Thus length of red ribbon is 3 inches

b)  length of blue ribbon = 27 inches

Therefore, from eqn 1,

Length of red ribbon = 27 - 7

Length of red ribbon = 20 inches

c) length of blue ribbon = x inches

Therefore, from eqn 1,

Length of red ribbon = x - 7

Thus length of red ribbon is (x - 7) inches

for finding the midpoint of any given 2 pair of points simply add the respective x coordinates with other x coordinate and the y coordinate with other y coordinate and divide them by 2

in your question it will be :

(3+1)/2 for the x coordinate of mid point i.e 2

[8+(-4)]/2 for the y coordinate of midpoint i.e 2

so coordinates of mid point of points (3,8) and (1,-4) will be (2,2)