Answer:
what there is nothing there
Answer:
60 gallons of 70% antifreeze
Step-by-step explanation:
Let n be the amount of 70% antifreeze. And the second brand was 45% pure anti freeze Then:
According to the question
0.7 n+.45(150-n)=0.55(150)
0.7 n+67.5-0.45 n=82.5
0.25×n=15
n=15/.25 = 60
You need 60 gallons of 70% antifreeze, and 90 gallons of 45% antifreeze for this mixture
Answer:
hence rate interest r = 41.176%
Step-by-step explanation:
The amount borrowed= $680
amount payed back = $750
therefore, interest incurred = 750-680= $70
time, t= 3 months = 3/12= 0.25 years
rate%, r
we know that SI=
70=
r=
hence rate interest r = 41.176%
Answer:(x-5)/8
Step-by-step explanation:
f(x)=8x+5
let f(x)-1=y
y=8x+5
interchanging x and y
x=8y+5
y=(x-5)/8
Therfore f(x)-1=(x-5)/8
14 science fiction, 2 romance, 4 biography, 10 adventure...total of 30 books
P(biography) = biographies / total books = 4/30 which reduces to 2/15 <=