Answer:
Step-by-step explanation:
The formulas to find the radius are quite simple. If you know the diameter of the circle, use this formula:
If you don't know the diameter, but you know the circumference, you can use this equation:
If you know the area of the circle, use this equation:
Note that the area of a circle is essentially the total space, measured in square units, inside of the perimeter of a circle.
its a sqaure so the angles are 90 degress each.
90 - 38 = 52
answer: C. 52
Answer:
Step-by-step explanation:
1) A perfect square is a whole number which is a product of a smaller whole number and itself. Examples of perfect squares are
4(2 × 2)
9(3 × 3)
16(4 × 4)
25(5 × 5)
36(6 × 6)
2) Square root of 4x² is 2x(product of square root of 4 and square root of x²)
3) square of 25 is 5
4) 4x² + 20x + 25
The general formula for solving quadratic equations is expressed as
x = [- b ± √(b² - 4ac)]/2a
From the equation given,
a = 4
b = 20
c = 25
Therefore,
x = [- 20 ± √(20² - 4 × 4 × 25)]/2 × 4
x = [- 20 ± √(400 - 400)]/8
x = [- 20 ± 0]/8
x = - 20/8
x = - 2.5
14.4, 120% of 12 is 100+20, 12+2.4 is 14.4
