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2 answers:
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First, identify the ratio:
1:50 (1 foot on the model is 50 feet on the house)
to find the actual height of the window multiply 1 1/5 by 50
*
=
300/5 simplifies into 60
the height of the real window is 60 feet
1:50 (1 foot on the model is 50 feet on the house)
to find the actual height of the window multiply 1 1/5 by 50
300/5 simplifies into 60
the height of the real window is 60 feet
There are 13 quarters in the jar.
Step-by-step explanation:
Given,
Number of coins in jar = 45 coins
Worth of coins = $5.90 = 5.90*100 = 590 cents
1 nickel = 5 cents
1 dime = 10 cents
1 quarter = 25 cents
Let,
Number of nickels = x
Number of dimes = y
Number of quarters = z
According to given statement;
x+y+z=45 Eqn 1
5x+10y+25z=590 Eqn 2
x+y=z+19 Eqn 3
Putting value of x+y from Eqn 3 in Eqn 2
Dividing both sides by 2
There are 13 quarters in the jar.
Keywords: linear equation, substitution method
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