Answer:
Area of trapezium = 1/2 * h (a+b)
here, 480= 1/2 *15*(20+b)
(20+b)=960/15
or, b=64-20
therefore, b= 44
.....
Hope u got it...xd
648 Im pretty sure if not let me know
Answer:
The last answer; 12.
Step-by-step explanation:
In order to solve this, use substitution. Since it gives you an equation for y, substitute that equation in the other formula as y. This will give you:
Then simplify:
Since 6x - 6x cancels out, you are left with 12.

Answer:
(2, -3)
Step-by-step explanation:
Answer:
-12
Step-by-step explanation:
Convert the mixed number to an improper fraction.
-2
= 
To divide, just multiply by the reciprocal.
So -2
÷
becomes
÷
Now you can multiply straight across.
×
= 
And simplify.
= -12
Please mark as Brainliest! :)