Answer:
(3x+5y)/8
Step-by-step explanation:
The total amount is 150+250=400
We then do (3x+5y)/2 × 1/400
This equals (3x+5y)/800
We multiply that by 100 giving us the final answer.
4.70, all the others can be simplified to 4.07 by taking away the zeroes after the 7 because they are not significant, The one before the 7 stays because it is significant as it is holding the tenths place value.
Your answer would be 4x-7=-3(3+4x) because it only has one solution which is x= -1/8
Use the formula a = a+b/2h
4/2 because 4/2=2 that is an integer
