To get from the real value to the model value, you must divide by 21 and times by two (since 21/21 = 1 and 1 x 2= 2 in the ratio) this is the same as multiplying by the fraction 2/21.
So, 1.7 x 2/21 = 17/105 = 0.16m or 16cm
Answer:
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Step-by-step explanation:
. You have that:
- The homeowner want the length of the swimming pool to be 4 feet longer than its width.
- He wants to surround it with a concrete walkway 3 feet wide.
- He can only afford 300 square feet of concrete for the walkway.
2. Therefore, the tota area is:
At=L2xW2
L2 is the lenght of the walkway (L2=L1+3+3⇒L2=(W1+4+6)⇒L2=W1+10).
W2 is the width of the walkway (W1+3+3⇒W2=W1+6)
3. The area of the walkway is:
A2=At-A1
A2=300 ft²
4. Therefore, you have that the width of the swimming pool is:
A2=(W1+10)(W1+6)-(W1+4)(W1)
300=(W1²+6W1+10W1+60)-(W1²+4W1)
W1²+16W1+60-W1²-4W1-300=0
12W1-240=0
W1=240/12
W1=20 ft
5. And the length is:
L1=W1+4
L1=20+4
L1=24 ft
Answer:
One family made $1,154 and the other family made $486.
Step-by-step explanation:
Let be "f" the amount of money (in dollars) one of the families made at the garage sale and "s" the amount of money (in dollars) the second family made at the garage sale.
Set up a system of equations:
You need to use the Substitution Method to solve this system of equations:
1. Substitute the second equation into the first equation.
2. Solve for "s".
Then:
3. Substitute the value of "s" into the second equation and then evaluate in order to find the value of "f". This is:
Answer:
Radius
Step-by-step explanation:
