No you can not prove that 9 +10 = 21.
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About $10 plus the value of the frame About $10 plus the value of the frame
11 protons and 10 electrons
Shekels are no longer used as currency, but ancient coins have survived so we know that a shekel weighed about 15 grams. The price of silver fluctuates, but as of today (November 10) it is about $21.34 USD per ounce. 15 grams of silver (1 shekel) at $21.34 per ounce equals $10.29 USD. Therefore 10 shekels of silver is worth about $102.90 USD in today's market.
a flat rate of $9 plus a discount of $0.80 for every race under 10 races
I assume you are refering to roofing material, since a "square" in the roofing industry is equivalent to 100 square feet of material. 1 linear meter equals 3.28084 feet 1 square meter equals (3.28084 ft)2 or 10.7639 square feet Therefore, 80 square meters equals 80 x 10.7639 square feet or 809.93 square feet Since a roofing "square"=100 sqft, 80 square meters equals 8.0993 "squares" If you don't want to carry a calculator around in the field, just remember that: 1 square meter is a bit under 11 square feet. and that 1 square of roofing will cover almost 10 square meters (but not quite) Rod Burrows, PE