9.There are 20 girls in a school club. The number of girls is 6 more than twice the number of boys. Find the number of boys. Solve the number word problems. 10.The difference of a number and 8 is 3. Find the number. 11.The sum of twice a number and eight is twenty. Find the number. Translate and solve. 12.What number is 35% of 120?

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Solve the simple interest problems. 15.Sam deposited $1250 in a bank account that earned simple interest of 5%. How much interest was earned in 3 years?

16.Tom lent his brother $1400 to buy a computer. Two years later, he paid him back the $1400 plus $70 interest. What was the rate of simple interest? 2.3: Solve a Formula for a Specific Variable Solve the formula for the given variable.

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Use the formula for the area of a triangle to solve the problem. 19.What is the height of a triangle with an area of 180 square inches and a base of 12 inches? 30 in Use the Pythagorean Theorem to solve the problem. 20.The length of one leg of a right triangle is 7 feet. The length of the hypotenuse is 25 feet. What is the length of the other leg?