Find the main errors in the following “Proofs” and write down your own correct proofs. Let k be an integer. If k > 0, then k
2 + 2k + 1 is composite.
“Proof:” For k = 2, k
2 + 2k + 1 = 22 + 2 · 2 + 1 = 9. But 9 = 3 · 3, and so 9 is
composite. Hence, the theorem is true.

x > 1.3

step by step:

8.5−0.9x> 9.8−1.9x

step 1: simplify both sides of the inequality.

−0.9x+8.5> −1.9x+9.8

step 2: add 1.9x to both sides.

−0.9x+8.5+1.9x> −1.9x+9.8+1.9x

1x+8.5> 9.8

step 3: subtract 8.5 from both sides.

1x+8.5−8.5> 9.8−8.5

1x> 1.3

step 4: divide both sides by 1.

1x/1 > 1.3/1

equal to

step-by-step explanation:

a line is an defined derm because it

a)contains an infinite number of points b) can be used to create other geometric shapes c)describes something that does not have width or depth d) is a term that does not have a formal definition. a line is an undefined term because it: contains an infinite number of points.

r and t.

both are 64 degrees.