Answer: 7cm
Step-by-step explanation:
The perimeter of a triangle is calculated by adding the length of the 3 sides together. Let the third side be x , then
x + 9 + 6 = 22
x + 15 = 22
Subtract 15 from both sides , that is
x = 22 - 15
x = 7
Therefore : the third side is 7cm
Answer:
-21
Step-by-step explanation:
If the equation of the line is
then 
is the slope of the line and 
is the y-intercept of the line.
In your case, the equation of the line is 
So, the slope of this line is 
and the y-intercept is 
Answer:
The final price of money of t shirt that I own = $ 16.69
Step-by-step explanation:
Given in question as ,
The t shirt cost to the owner = $12
The markup percentage = 30%
So, now the cost price of t shirt = 30% of 12 + 12
= 3.6 + 12 = $15.6
Tax which is added now = 7%
So, new cost of t shirt = 7% of 15.6 + 15.6
= 1.092 + 15.6 =$ 16.69
Hence , the final price of money of t shirt that I own = $ 16.69 Answer
Answer: 4. -12
4. 9
6.17
Step-by-step explanation:
It's an isosceles triangle so angles A and BCA are congruent.
Angle BCA is the supplement of BCD, so 180-109 = 71.
Angle A is congruent to that, so A=71 degrees.
Let's see if we can get that in the format they want, kind of as a proof.
1. ∠BCD=109° Reason: Given
2. AB ≅ BC Reason: Given
3. ∠BCA = 71° Reason: Linear pairs are supplementary
4. ΔABC is isosceles. Reason: Definition of isosceles
5. ∠A ≅ ∠BCA Reason: Isoceles triangle theorem
6. ∠A = 71° Reason: Def congruent
Answer: 71 degrees
