Answer:
x = ±√11 +2
Step-by-step explanation:
Given in the question an equation,
x²- 4x - 7 = 0
Step 1
take 7 to the right side of equation
x²- 4x = 7
Step 2
To create a trinomial square on the left side of the equation, find a value that is equal to the square of half of b, the coefficient of x
2ab = -4x
2xb = -4x
b = -2
Step 3
Take square of b and add it to each side of the equation.
x²- 4x + (-2)²= 7 + (-2)²
x²- 4x + 4 = 7 + 4
x²- 4x + 4 = 11
Step 4
Factor the perfect trinomial square
(x−2)² = 11
Step 5
take square root on both sides
√(x−2)² = √11
(x-2) = ±√11
x = ±√11 +2
Answer:
37.7
Explanation:
Just look at the number behind it if its a 5 or above it rounds up if not it stays the same and the ret of the numbers are zeros
Answer:
15 feets
Step-by-step explanation:
From. Trigonometric relation :
Tanθ = opposite / Adjacent
Tan 33.69 = 10 / x
0.6666649 = 10 / x
x = 10 / 0.6666649
= 15 feets
Hence, base of tree to swingset is 15 feets
0.90 and 0.900. Add as many 0's to the end and the number remains the same :)
Drag the expressions into the boxes to correctly complete the table.
