Answer:
Step-by-step explanation:
First of all, you have to set up the equation
2x^2 + x -1 = 2 Subtract 2 from both sides
2x^2 + x - 1 - 2 = -2+2 Combine
2x^2 + x - 3 = 0 This factors.
(2x + 3)(x -1 ) = 0
Either
2x + 3 = 0 Subtract 3 from both sides
2x = - 3 Divide by 2
2x/2 = - 3/2
x = - 3/2 which you already know
or
x - 1 = 0 Add 1
x - 1 + 1 = 1
x = 1
the other answer is x = 1
You need to fine the radius by dividing the circumference by 2 and then multiply that by pi (3.14) or (22/7)
Answer: B
Step-by-step explanation:
Answer:
A) The angles are 30-60-90. The longest leg (hypotenuse) of the triangle is twice the shortest leg. The middle leg is the shortest leg times the square root of 3.
Step-by-step explanation:
The answer choice speaks for itself.
The legs of a 45-45-90 triangle have the ratios 1 : 1 : √2.
The legs of a 30-60-90 triangle have the ratios 1 : √3 : 2.
Clearly, the given leg lengths match the second set of ratios more closely:
10 : 17.32 : 20 ≈ 1 : √3 : 2.
