Answer: x = 10
Step-by-step explanation:
10x+20y=540
x+y=34
y=34-x
Plug in (34-x) for y:
10x+20(34-x)=540
10x+680-20x=540
-10x=-140
10x=140
x=14
There were 14 ten cent coins and 20 20 cent coins
Answer:
(A)
Step-by-step explanation:
Let y be the length of the rectangular backyard and then according to the question, y should be atleast 150 ft, then the possible inequality is:

and the distance around should be no more than 450ft, then the possible inequality is:

Then, the shaded region (green) is the possible dimensions of the backyard.
First I would convert 20 and 12 to millimeters which would be 20= 200mm 12= 120mm. You would then find the area if the grid which would be 200•120=
Step-by-step explanation:
Plz make it brainlist answer