First choose 1 equation and set it equal to 180 because supplementary angles equal up to 180 degrees.
12q - 9 =180
Now solve for q.
12q - 9 +9 = 180 + 9
12q = 189
12q/12 = 18912
q = 15.75
now subtract 15.75 from 180
180.00 - 15.75 = 164.25
Your angles equal to 164.25 and 15.75 degrees.
To solve this you first expand the brackets.
4x^2 - 20x + 25 = 49
Then make it equal 0.
4x^2 - 20x - 24 = 0
Now solve the quardratic.
x^2 - 5x - 6 = 0
(x - 6)(x + 1) = 0
x = 6 or x = -1
Given:
The expression is

The steps are given.
To find:
The mistake in her steps.
Solution:
We have,

The correct steps are shown below.
Step 1: Taking out x as common factor.

Step 2: Now, taking out 2x² as common factor from first two terms (first group of terms) and -1 form last two terms (second group of terms) in the parentheses.

Step 3: Taking out (x+1) as common factor.

She incorrectly factored -1 from the second group of terms.
Therefore, the correct option is B.
Hope it helps! Please mark me as Brainliest
1. Answer is 4.5 km / hr.
... because you divide the time but the distance so for this question you divide 22.5 by 5 and that's your answer. do the same for every question! hope this helps.