Let's assume
rent of the one chair = x
rent of the one table = y
3x + 2y = 24
8x + 4y = 53
multiply the first equation by 2
6x + 4y = 48
8x + 4y = 53
if we subtract from last equation to previous equation,
2x = 5
x = 2.5
y = 8.25
Therefore the cost of one chair is 2.5 dollars
the cost of one table is 8.25 dollars
Answer:
System of equations:
20x + 30y = 650
x + y = 25
Time underwater = 10 hours
Time at the surface = 15 hours
Step-by-step explanation:
Let x = time underwater at 20 km/h.
Let y = time on the surface at 30 km/h.
speed = distance/time
distance = speed * time
distance underwater: 20x
distance on the surface: 30y
total distance: 650
20x + 30y = 650
total time: x + y
total time: 25
x + y = 25
20x + 30y = 650
x + y = 25
20x + 30y = 650
-20x - 20y = -500
--------------------------------
10y = 150
y = 15
x + y = 25
x + 15 = 25
x = 10
A growth function has the following form.
where
= Original amount,
r = annual rate of change,
n = number of periods,
t = time in years
Since the time is in years, we need to convert t into days. We know that 1 year = 365 days. So t years = 365t days.
So in this case, n = 365, r = 0.0095.
Then the function is rewritten as follows.
The daily growth rate would be
Answer:No. of paper square = 4 m^2/ 40 cm^2
= 40000cm^2 /40 cm^
= 1000 paper squares.
Thanks.
Step-by-step explanation:
Answer:
Height=28
Step-by-step explanation:
You have to work backwards using the formula for a triangle, A=1/2bh
Plug your values in, 126=1/2 9 h
126=4.5 h
126 divided by 4.5 is 28
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