Answer:
n = -36
Step-by-step explanation:
The formula here is:
n
---- = -12.
3
Solve for n by mult. both sides by 3: n = -36.
Answer:
28 students
Step-by-step explanation:
x = Number of students
21 students = 75 percent of x = 3/4 x
3/4 x = 21
x = 21 * (4/3) = 7*4 = 28
Answer:
He have 43 bills of 10 and 13 bills of 5
Step-by-step explanation:
5x + 10y = 495
x + y = 56
Isolate x:
x = 56 - y
Substitute in the first equation:
5(56 - y) +10y = 495
280 -5y +10 y = 495
5y = 495 -280
5y = 215
y = 215/5
y= 43
Now substitute the value of y to find x:
x = 56 - y
x = 56 - 43
x = 13
Take 2,720/34,000=.0806. This means that 2,720 is 8.06% of the original number. In order to find the percentage of decrease, you take 100%-8.06%, which equals 91.94%. Your answer is 91.94%.
Answer:
1 1/3
Step-by-step explanation:
Something that is not a inproper fraction is a proper fraction which is :
The numerator is less than the denominator
Examples: 1/3, 3/4, 2/7.
Or a mixed fraction which is:
A whole number and proper fraction together
Examples: 1 1/3, 2 1/4, 16 2/5
