Hello :
x²+8x-3=0
(x² +2(4)x +4²) -4² -3 = 0
(x+4)²-19 = 0
(x+4)² = 19
x+4 = √19 or x+4 = - √19
x = √19 - 4 or x = -√19 - 4
The question gives the relationship to be
![1in=21mi](https://tex.z-dn.net/?f=1in%3D21mi)
We will interpolate to solve the question.
First Question: 147 mi
![\begin{gathered} \text{If 1 in = 21 mi} \\ x\text{ in = 147 mi} \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20%5Ctext%7BIf%201%20in%20%3D%2021%20mi%7D%20%5C%5C%20x%5Ctext%7B%20in%20%3D%20147%20mi%7D%20%5Cend%7Bgathered%7D)
Cross multiplying,
Answer:
7.6
Step-by-step explanation:
m<DBA is 68 degrees
Answer:
One has 4 sides and one has 3 sides
Step-by-step explanation:
a square has 4 sides and an equilateral triangle has 3 sides
Answer:
80
Step-by-step explanation: