**<u>Given</u>****<u> </u>****<u>2</u>****<u> </u>****<u>right</u>****<u> </u>****<u>angles</u>****<u>,</u>****<u> </u>****<u>are</u>****<u> </u>****<u>always</u>****<u> </u>****<u>supplementary</u>****<u> </u>****<u>and</u>****<u> </u>****<u>congruent</u>**

**Answer:**

-5.5, -3.75, 9/4

**Step-by-step explanation:**

9/4 is 2.25 so this is your answer.

**Answer:**

3:10

**Step-by-step explanation:**

Solution to the question is in the attached picture.

**Answer:**

58.4

119.2

**Step-by-step explanation:**

Givens

Let one angle = x

Let the other angle = x + 58.4

Together they make 180 degrees.

Equation

x + x + 58.4 = 180 Collect like terms.

Solution

2x + 58.4 = 180 Subtract 58.4 from both sides

2x = 180 - 58.4

2x = 121.6 Divide by 2

x = 60.8

Answer

x = 60.8

x + 58.4 = 119.2

**Answer:**

The third is an arithmetic sequence

**Step-by-step explanation:**

An arithmetic sequence means we add the same amount each time as n increases by 1

In the first, we add -6 then -12, then -24 so it is not arithmetic

In the second we add 2 then 4 then 6 then 8

In the third, we add -1.4 each time