40% of the number 50 is 20
Answer:
<em>24 children</em>
Step-by-step explanation:
If the length of time, y hours, it takes to put a jigsaw puzzle together is inversely proportional to the number of children, x, this is represented as;

k is the constant of proportionality
If it takes 16 children 6 hours to put the jigsaw puzzle together, this means at x = 16, y = 6
Substitute:
6 = k/16
k = 6*16
k = 96
W are to find number of children needed to put the same jigsaw puzzle together in 4 hours, this is done by substituting k = 96 and y = 4 into the expression y = k/x
y = 96/4
y = 24
<em>Hence it will take 24 children to put the same jigsaw puzzle together in 4 hours</em>
<em></em>
Answer:
x = 9
y = 4
Step-by-step explanation:
Substitution! View images attached ^^
Answer:
F=$3810
Step-by-step explanation:

F= future value
P= present value
i = interest
n= number of times money compounded
P=$3000 i=6% n = 2 X 4= 8
As this is semiannual so 6%/2=3%




Answer:
AM=5
Step-by-step explanation:
AM=MC
3y-4=2y-1
3y-2y-4=-1
+4 +4
y=3
so
AM=3*3-4=9-4=5