Please help!! 9. Multiply. x+2/5x-15 times (10x^2-25x-15)
21. Do the data in the table represent a direct variation or an inverse variation? Write an equation to model the data in the table.
x- 1 2 5 10
y-6 12 30 60
23. What are the excluded values of the function? y=-2/5x+40

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116

the answer, i believe is y-8=1(x+4)