Write and explicit formula for a n, the nth term of the sequence 7,-28,112

Brent needs to paint a logo made using two right triangles. the dimensions of the logo are shown below. what is the difference between the area of the large triangle and the area of the small triangle? (1 point) select one: a. 4.5 cm2 b. 8.5 cm2 c. 16.5 cm2 d. 33.0 cm2

What is the area of the triangle 10 13 12

If t8 = 4 and t12 = −2, find the first three terms of the arithmetic sequence.