Answer:
24 days
Step-by-step explanation:
120 students =30 days
120+30 =150 students
MORE/LESS METHOD
120 students (a) : 30 days(y)
150 students (b) : x
Find the value of x using the formula: a/b × y
If you think the value of x will be more than y then the bigger number will be the numerator. If u think x will be less, then the smaller number will be in the numerator.
I predict that x will be less than y
THEREFORE... 120/150 ×30
= 24 days
2x-3y=1
+2x+3y=2
4x=3 substitute 3/4 for x in the first equation..you get y=2/9.
x=3/4
Answer:
Step-by-step explanation:
The correct proportion can be written in two ways:
one way . . . . . $10.30/10 = x/2
other way . . . . 10/$10.30 = 2/x
(Of course, the left side and right side can be swapped too.)
Neither of these equations appears on the list, so
the correct choice appears to be "none of the above". (e)