Answer:
C.
Step-by-step explanation:
The answer is C
1. 78 = 0.15x
78 / 0.15 = x
520 = x.....so 78 is 15% of 520
2. | 3x - 2 | = 8 | x + 1 | = 1
3x - 2 = 8 -(3x - 2) = 8 x + 1 = 1 -(x + 1) = 1
3x = 8 + 2 -3x + 2 = 8 x = 1 - 1 -x - 1 = 1
3x = 10 -3x = 6 x = 0 -x = 2
x = 10/3 x = -2 x = -2
ur answer is : x = -2
3. 3y - 4x + 5 = 0
3y = 4x - 5
y = 4/3x - 5/3
slope = 4/3
Answer:
Five bags of dog food costs $21.25.
Step-by-step explanation:
We can solve using proportions.
![\frac{6 \: bags}{25.50 \: dollars} = \frac{5 \: bags}{x} \\ \\ \frac{127.5}{6} = \frac{6x}{6} \\ \\ 21.25 = x \\ 21.25 \: dollars = x](https://tex.z-dn.net/?f=%20%5Cfrac%7B6%20%5C%3A%20bags%7D%7B25.50%20%5C%3A%20dollars%7D%20%20%3D%20%20%5Cfrac%7B5%20%5C%3A%20bags%7D%7Bx%7D%20%20%20%5C%5C%20%20%5C%5C%20%20%5Cfrac%7B127.5%7D%7B6%7D%20%20%3D%20%20%5Cfrac%7B6x%7D%7B6%7D%20%20%5C%5C%20%20%5C%5C%2021.25%20%3D%20x%20%5C%5C%2021.25%20%5C%3A%20dollars%20%3D%20x)