I will give you a crown if it is right. Will you help me

First two diagrams

Step-by-step explanation:

In the following diagram, angles a and b are supplementary of they add up to 180 degrees. Since there aren't any angle measurements, we can visually check if two angles are supplementary by checking if they form a straight line. Looking at the different graphs, we see that a and b form a straight line only in the first and second graphs. Therefore, the angles a and b are only supplementary in the first two diagrams.

0.16 or 16%

step-by-step explanation:

lets take a coin for example.

if you toss it twice, it has a 1/4 chance of landing on heads both times because 1/2 * 1/2 is 1/4.

with the cards, the chance of picking dog is 0.4. having two people pick one is like picking a card twice in a row. so 0.4 * 0.4 is 0.16, or 16%

step-by-step explanation:

ok so im not 100% sure but you would start by adding 5.1t and 1.9t beacuse they have the same variable. that is 7t.   then add -3.6 + 1.2 which is -2.4

so then keep that as -2.4 + 7t. i apologize if this is incorrect. best luck on your test < 3