Answer:
y= 126
Step-by-step explanation:
The given equation is: y= 3x-2x^2+5x^3
Substituting the value x=3 in the above equation,we get
y= 3(3)-2(3)^2+5(3)^3
⇒y= 9-2(9)+5(27)
⇒y= 9-18+135
⇒y= 126
3y+5=7x
3y=7x-5
y=(7x-5)/3
...
21y-49x becomes
7(7x-5)-49x
49x-35-49x
-35
Answer:
they all cancel out it would be 0
Step-by-step explanation:
1.) 2.5 (two and a half)
2.)1.67 (approximately one and a half)
3.)the value of red paint with go up by 2 each time and the value of blue paint will increase by 3 each time
Answer:
Option B , C and E are correct

(y+25)(y-30)=0
Step-by-step explanation:
Given : Area of rectangular room is 750 square feet.
Width of the room is 5 feet less than the length of the room.
Let y be the length of the room
then,
As per the given condition
width of the room is: y-5
Area of rectangle is multiply the length by its width.
Area of rectangle = 
Substitute the given values in above formula we get;
......[1]
or we can write this as;
750 -y(y-5)=0
[1] ⇒
or
or


(y+25)(y-30)=0
Therefore, the equation which can be used to solve for y are;
,
and (y+25)(y-30)=0