Answer:
1.B. angles 3 and 4 are supplementary (they add up to make 180)
2. B x+90+63=180
Step-by-step explanation:
anything on a straight line add up to equal 180
The answer is B, 3/4 is greater than 3/5
3/4=0.75
3/5=0.6
0.75 is greater than 0.6
Answer:
Step-by-step explanation:
For a quadratic equation ![ax^2+bx+c=0](https://tex.z-dn.net/?f=ax%5E2%2Bbx%2Bc%3D0)
we can complete the squares
Divide by a to get
![x^2+\frac{bx}{a} +\frac{c}{a} =0](https://tex.z-dn.net/?f=x%5E2%2B%5Cfrac%7Bbx%7D%7Ba%7D%20%2B%5Cfrac%7Bc%7D%7Ba%7D%20%3D0)
Complete the square as
![(x+\frac{b}{2a} )^2 -\frac{b^2}{4a^2} -+\frac{c}{a} =0\\(x+\frac{b}{2a} )^2=\frac{b^2}{4a^2} --\frac{c}{a}=\frac{b^2-4ac}{2a}](https://tex.z-dn.net/?f=%28x%2B%5Cfrac%7Bb%7D%7B2a%7D%20%29%5E2%20-%5Cfrac%7Bb%5E2%7D%7B4a%5E2%7D%20-%2B%5Cfrac%7Bc%7D%7Ba%7D%20%3D0%5C%5C%28x%2B%5Cfrac%7Bb%7D%7B2a%7D%20%29%5E2%3D%5Cfrac%7Bb%5E2%7D%7B4a%5E2%7D%20--%5Cfrac%7Bc%7D%7Ba%7D%3D%5Cfrac%7Bb%5E2-4ac%7D%7B2a%7D)
Take square root
![(x+\frac{b}{2a} =\sqrt{\frac{b^2-4ac}{2a} }\\x=\frac{=b+/-\sqrt{b^2-4ac} }{2a}](https://tex.z-dn.net/?f=%28x%2B%5Cfrac%7Bb%7D%7B2a%7D%20%3D%5Csqrt%7B%5Cfrac%7Bb%5E2-4ac%7D%7B2a%7D%20%7D%5C%5Cx%3D%5Cfrac%7B%3Db%2B%2F-%5Csqrt%7Bb%5E2-4ac%7D%20%7D%7B2a%7D)
Answer:
1.142857
Step-by-step explanation:
2/7 *4 = 2x7/7x1 = 8/7
Answer:
54 cm
Step-by-step explanation:
A cube has six sides. The area of each face is found by squaring the length of a side. To get the total surface area of the cube, you'll multiply the area of one face by the number of faces.
a = edge
Area = 6a to the power of 2