Answer:
x = sqrt(10) - 9 or x = -9 - sqrt(10)
Step-by-step explanation by completing the square:
Solve for x:
x^2 + 18 x + 71 = 0
Subtract 71 from both sides:
x^2 + 18 x = -71
Add 81 to both sides:
x^2 + 18 x + 81 = 10
Write the left hand side as a square:
(x + 9)^2 = 10
Take the square root of both sides:
x + 9 = sqrt(10) or x + 9 = -sqrt(10)
Subtract 9 from both sides:
x = sqrt(10) - 9 or x + 9 = -sqrt(10)
Subtract 9 from both sides:
Answer: x = sqrt(10) - 9 or x = -9 - sqrt(10)
In mathematics, the factorial of a positive integer n, denoted by n!, is the product of all positive integers less than or equal to n: For example, The value of 0! is 1, according to the convention for an empty product.
Answer:
4.2
Step-by-step explanation:
distance between two points = sqrt (x₂ - x₁)² + sqrt(y₂ - y₁)²
sqrt (3 - 6)² + sqrt(6 - 3)²
sqrt (-3)² + sqrt(3)²
4.242640
Round to nearest tenth:
4.2
There are 7 humans and 15 dogs
7+15= 22 heads
7×2=14 legs for humans
15×4=60 legs for dogs
14+60=74 legs
i think its 12 because the two triangles look identical so both angles should measure up to 60°. 5 × 12 = 60. also in that case y would be 7.
