Answer:
C
Step-by-step explanation:
i think its c because 4 times -7 is negative 28, which means that the other answers are wrong. please give me brainliest!!<3
Formula for slope: 
y₂: 6
y₁: 8
x₂: 1
x₁: -2
Plug them into the slope equation:

--> 
---> 
The slope is
.
Because if X is ten then the equation is complete
Answer:
.85
Step-by-step explanation:
Start at the end.
The 5 makes the 7 an 8, which makes the 8 an 9, which makes the 4 a 5.
Answer:
$6.45
Step-by-step explanation:
$21.50-$15.05=$6.45