Answer:
The equation is c=25h+30 and the answer is 205
Step-by-step explanation:
Plug in 7 for h.
The first two is worth 2,000 and the second is worth 200.
Answer:
The answer is 30
Step-by-step explanation:
First you have to find 120% of a (12).
![\frac{12}{1} \times \frac{120}{100} = 14.4](https://tex.z-dn.net/?f=%20%5Cfrac%7B12%7D%7B1%7D%20%20%5Ctimes%20%20%5Cfrac%7B120%7D%7B100%7D%20%20%3D%2014.4)
Therefore; 14.4 is 80% of b, and we are trying to find 100% of b
![14.4 = 80\% \\ x = 100\%](https://tex.z-dn.net/?f=14.4%20%3D%2080%5C%25%20%5C%5C%20x%20%3D%20100%5C%25)
we do not know what is 100% therefore we call it *x*. In order to find this unknown value *x* we cross multiply.
![14.4 \times 100\% = 80\% \times x](https://tex.z-dn.net/?f=14.4%20%5Ctimes%20100%5C%25%20%3D%2080%5C%25%20%5Ctimes%20x)
This is the same as saying;
![14.4 \times 1 = x \times \frac{4}{5}](https://tex.z-dn.net/?f=14.4%20%20%5Ctimes%201%20%3D%20x%20%5Ctimes%20%20%5Cfrac%7B4%7D%7B5%7D%20)
100% percent would be 1 because it is the whole number we are trying to find. The 80% would be 4/5. To get 4/5 you can simply break down 80/100 ( this is 80% as a fraction).
so the new equation is: 14.4= 4/5x
We divide both sides by 4/5. Then we will get x tobe equal to 18. Therefore b is 18. We were asked to find (a + b) so.<em> </em><em>1</em><em>8</em><em>+</em><em>1</em><em>2</em><em> </em><em>=</em><em> </em><em>30</em>
Answer:
<u>x = -8</u>
4x + 8 = 2x - 8
3x + 4 = 2x - 4
2x + 16 = x + 8
x - 1 = 2x + 7
17x + 36 = 16x + 28
13x + 2 = 12x + 11
.......
(this is infinite)
As long as it cancels out to x = -8