Answer:
y=14-8x
x= -2 + 3y/9x
Step-by-step explanation:
8x+y=14
isolate y so you get:
y=14-8x
-9x+3y=18
isolate x so you get:
-9x=18-3y
divide on both sides to get x by itself
-9x/-9x 18-3y/-9x
x= -2 + 3y/9x
Hope this helps :)
No multiple of 7 can go into either 6 or 5 .
The smallest multiple of 7 that's <em>also</em> a multiple of 5 and 6 is 210 .
Solution: We are required to find the correlation between x and y here:
The formula for correlation is:
![r=\frac{n\sum x y- \sum x \sum y}{\sqrt{[n\sum x^{2}-(\sum x)^2][n\sum y^{2}-(\sum y)^2]}}](https://tex.z-dn.net/?f=r%3D%5Cfrac%7Bn%5Csum%20x%20y-%20%5Csum%20x%20%5Csum%20y%7D%7B%5Csqrt%7B%5Bn%5Csum%20x%5E%7B2%7D-%28%5Csum%20x%29%5E2%5D%5Bn%5Csum%20y%5E%7B2%7D-%28%5Csum%20y%29%5E2%5D%7D%7D)
![=\frac{6\times 159- 31 \times 18}{\sqrt{[6 \times 203-(31)^2][6 \times 258-(18)^2]}}](https://tex.z-dn.net/?f=%3D%5Cfrac%7B6%5Ctimes%20159-%2031%20%5Ctimes%2018%7D%7B%5Csqrt%7B%5B6%20%5Ctimes%20203-%2831%29%5E2%5D%5B6%20%5Ctimes%20258-%2818%29%5E2%5D%7D%7D)
Hence the option A. 0.7061 is correct
Answer: The slope of a vertical line. A vertical line has undefined slope because all points on the line have the same x-coordinate. As a result the formula used for slope has a denominator of 0, which makes the slope undefined.
A horizontal line has slope 0 because all its points have the same y-coordinate. As a result, the formula used for slope evaluates to 0.
Hope that helps!
Answer:
70
Step-by-step explanation:
Evaluate 3 b^2 - b where b = 5:
3 b^2 - b = 3×5^2 - 5
Hint: | Evaluate 5^2.
5^2 = 25:
3×25 - 5
Hint: | Multiply 3 and 25 together.
3×25 = 75:
75 - 5
Hint: | Subtract 5 from 75.
| 7 | 5
- | | 5
| 7 | 0:
Answer: 70
