Evaluate the expression when a = -6 and y=2 . a-6y

-18

Step-by-step explanation:

So we have the expression:

And we want to evaluate it when y=2 and a=-6.

Substitute in these values:

Multiply:

Subtract:

-18

Step-by-step explanation:

We are given the expression:

and asked to evaluate when a= -6 and y=2.

Therefore, we must substitute -6 in for a and 2 in for y.

Solve according to PEMDAS: Parentheses, Exponents, Multiplication, Addition, and Subtraction.

Multiply 6 and 2.

Subtract 12 from -6.

The expression a-6y when evaluated for a=-6 and y=2 is equal to -18.

i think the answer is b.

step-by-step explanation:

not 100% sure though.

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.