Which value of d is a solution to equation 2.2d + 5.4= 12

Hello!

d=3

*The answer must have a positive sign.*

Step-by-step explanation:

Distributive property: a(b+c)=ab+ac

First, you multiply by 10 from both sides of an equation.

Then, you had to refine the problem down.

Next, you subtract by 54 from both sides of an equation.

Simplify.

You can also divide by 22 from both sides of an equation.

And finally, simplify and solve. You can also divide by the numbers.

Final →

Hope this helps!

Thanks!

-Charlie

Have a great day!

:)

:D

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.