v-10=-9
Solve for v.
Add 10 to each side of the equation:
v-10+10 =-9+10
v= 1
Answer:
Step-by-step explanation:
<u>Given equation:</u>
- x² + y² + 8x - 4y - 7 = 0
<u>Convert this to standard form by completing the square:</u>
- (x - h)² + (y - k)² = r², where (h, k) - center, r - radius
- x² + 2*4x + 4² + y² - 2*2y + 2² - 16 - 4 - 7 = 0
- (x + 4)² + (y - 2)² - 27 = 0
- (x + 4)² + (y - 2)² = 27
- (x + 4)² + (y - 2)² = (√27)²
The center is (- 4, 2) and the radius is √27
Answer:
90°
Step-by-step explanation:
If you look closely at ADB you see that it is a right triangle. This means that it has a 90° angle. It also means that it measures 90°.
It would mean the fence has to be 41 feet long and 36 feet wide. To find the perimeter of the fence, it would be 41+41+36+36 which equals 82+72 so 154 feet of fencing
