Answer:

Step-by-step explanation:
x-7y = -49
i) move x to the right-hand side and change its sign
-7y = -49-x
ii) change the signs on both sides of the equation
7y = 49+x
iii) divide both sides of the equation by 7


iv) use the commutative property to reorder the terms
* commutative property: a+b = b+a

Answer: 252
Step-by-step explanation:
Answer:
-2
Step-by-step explanation:
because the slope is 2, a perpendicular line must be the inverse
the equation for y1 is y=2x+1
y2= -2y+1
Answer:
9
Step-by-step explanation:
x+x+1+x+2 = 15+x+2
3x+3=x+17
3x=x+14
2x=14
x=7
7+8+9=24
9+15 = 24
Answer:
$ 35.96
Step-by-step explanation:
Let x be the cost ( in dollars ) of 4 ounces of the pecans,
So, the ratio of the cost and ounces needed = 
Also, the cost of 1 ounces of pecans is $ 8.99,
Thus, the ratio of the cost and ounces needed = 
Hence, we can write,

Which is the required proportion,
By cross multiplication,
x = 4 × 8.99 = 35.96
Therefore, $ 35.96 is the cost of 4 ounces of the pecans.