In the figure shown de = 7x-13 and df =3x+3 what is the length of df?

The length of DF is 15

Step-by-step explanation:

Since the two lines are equal, which is given by the markings on the triangle, then you can set the two lengths equal and find x.

7x - 13 = 3x + 3

4x - 13 = 3

4x = 16

x = 4

Now that we know x = 4, we can plug into the DF length to find its amount.

DF = 7x - 13

DF = 7(4) - 13

DF = 28 - 13

DF = 15

341

step-by-step explanation:

all you have to do is 9x31 (which equals 279) and then 20x31 (which equals 620). then you have to subtract. 620-279=341.

a_n = a_1 + (n - 1)d

the first term is 6.

the common difference d = ?

when you find d, replace n with 7 and d with the common difference to find your answer.