Find the first five terms for the following arithmetic sequence Tn=5n-6?

The first five terms are -1,4,9,14 and 19.

Step-by-step explanation:

The arithmetic sequence is :

We need to find the first five terms of the sequence.

Put n = 1 for first term.

Put n = 2 for second term.

Put n = 3 for third term.

Put n = 4 for fourth term.

Put n = 5 for fifth term.

Hence, the first five terms are -1,4,9,14 and 19.

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.