Answer:
52
Step-by-step explanation:
First you can eliminate the one and put 40 to the side. Then you are left with the 0.3. Multiply 40 by 0.3 to get 12. The add 40 and 12 to get 52
<span>y=2x+1 (1)
</span><span>-4x+2y=2 (2)
2y = 4x + 2
divide the equation both sides by 2
y = 2x + 1
so both equations are the same
answer
infinitely many solutions</span>
The relationship is they both share the multiplication number of 3
3x23=69
3x24=72
Answer:
Step-by-step explanation:
Arithmetic sequence
First term a = 13
Common difference = 2nd term - first term
= 22 - 13
d = 9
![a_{n}= a + (n-1)d\\\\a_{7}= 13 + 6*9](https://tex.z-dn.net/?f=a_%7Bn%7D%3D%20a%20%2B%20%28n-1%29d%5C%5C%5C%5Ca_%7B7%7D%3D%2013%20%2B%206%2A9)
= 13 + 54
= 67
Sum of 7 terms = ![\frac{n}{2}(2a + (n-1)d)\\\\](https://tex.z-dn.net/?f=%5Cfrac%7Bn%7D%7B2%7D%282a%20%2B%20%28n-1%29d%29%5C%5C%5C%5C)
= ![\frac{7}{2}(2*13+6*9)\\](https://tex.z-dn.net/?f=%5Cfrac%7B7%7D%7B2%7D%282%2A13%2B6%2A9%29%5C%5C)
=![\frac{7}{2}(26+54)\\](https://tex.z-dn.net/?f=%5Cfrac%7B7%7D%7B2%7D%2826%2B54%29%5C%5C)
= ![\frac{7}{2}*80\\](https://tex.z-dn.net/?f=%5Cfrac%7B7%7D%7B2%7D%2A80%5C%5C)
= 7 *40
= 280
(x-12)(x-1) is the answer.