Answer:
48 is 60% of 80
Step-by-step explanation:
set it up as an equation
(100) 48 = × 80 (100)
4800 = 80x (divide both sides by 80)
x=60
meaning that 48 is 60% of 80
To solve this you must use a proportion like so...
We know that percent's are always taken out of the 100. This means that one proportion will have x (the unknown percent) as the part and 100 as the whole
We want to know out of what percent is 48 in the number 80. This means 48 is the part and 80 is the whole.
Now you must cross multiply
48*100 = 80*x
4800 = 80x
To isolate x divide 80to both sides
4800/80 = 80x/80
60 = x
This means that 48 is 60% of 80
Hope this helped!
~Just a girl in love with Shawn Mendes
SOLUTION
From the question, the center of the hyperbola is
a is the distance between the center to vertex, which is -1 or 1, and
c is the distance between the center to foci, which is -2 or 2.
b is given as
But equation of a hyperbola is given as
Substituting the values of a, b, h and k, we have
Hence the answer is
Let:
x = Chemistry textbooks sold
y = Physics textbooks sold
The textbook store sold a combined total of 260, so:
The number of chemistry books sold was three times the number of physics textbooks sold, so:
Let:
Replace (2) into (1):
Replace the value of y into (2):
