Answer:
Option A.
Step-by-step explanation:
we have
![x+\frac{b}{2a} =\pm\sqrt{\frac{b^2-4ac}{4a^2}}](https://tex.z-dn.net/?f=x%2B%5Cfrac%7Bb%7D%7B2a%7D%20%3D%5Cpm%5Csqrt%7B%5Cfrac%7Bb%5E2-4ac%7D%7B4a%5E2%7D%7D)
Simplify the right side of the equation
we know that
![\pm\sqrt{\frac{b^2-4ac}{4a^2}}=\pm\frac{\sqrt{b^2-4ac}}{\sqrt{4a^2}}=\pm\frac{\sqrt{b^2-4ac}}{2a}](https://tex.z-dn.net/?f=%5Cpm%5Csqrt%7B%5Cfrac%7Bb%5E2-4ac%7D%7B4a%5E2%7D%7D%3D%5Cpm%5Cfrac%7B%5Csqrt%7Bb%5E2-4ac%7D%7D%7B%5Csqrt%7B4a%5E2%7D%7D%3D%5Cpm%5Cfrac%7B%5Csqrt%7Bb%5E2-4ac%7D%7D%7B2a%7D)
so
The expression is
![x+\frac{b}{2a}=\pm\frac{\sqrt{b^2-4ac}}{2a}](https://tex.z-dn.net/?f=x%2B%5Cfrac%7Bb%7D%7B2a%7D%3D%5Cpm%5Cfrac%7B%5Csqrt%7Bb%5E2-4ac%7D%7D%7B2a%7D)
therefore
x plus b over 2 times a equals plus or minus the square root of b squared minus 4 times a times c, all over 2 times a
9514 1404 393
Answer:
4 cm
Step-by-step explanation:
The area of the triangle is half the area of the rectangle. The base of the triangle is the diameter of the circle, 14 cm. So the height is found from ...
A = 1/2bh
(56 cm²)/2 = 1/2(14 cm)h
h = (28 cm²)/(7 cm) = 4 cm
The height of triangle ADC is 4 cm.
Answer:
335
Step-by-step explanation:
multiply it by 2 and 3 respectively
Answer:
8x + 10
Step-by-step explanation:
2(4x+5)
2 x 4x = 8x
+
2x5 = 10
8x + 10
Answer: 2/3
Step-by-step explanation:
Since the line is going through the origin it slope will use the formula y/x = k where k is the slope. So you can use any point on the number line to determine the slope.
use the point (3,2) using the formula y/x = k divide the y by x.
k = 2/3