Twice the difference of a number and 9 is 7

Rodrigo sits at a street corner and records the number of red sports cars that are and are not speeding. What kind of study is this?

2 yards equal how many feet

The sum of two numbers is 44. the smaller number is 20 less than the larger number. what are the numbers?

How is 0.5,0.05 and 0.005

The volume of a cone is 201.92 cubic units. If a cylinder has the same height and radius as a cone what is it's volume in cubic units?

Tina had $47.10 in her bank account on Monday. She withdrew $25 on Monday and also made a deposit of an amount d that she cannot remember. Tina had $97.43 in her account on Tuesday.

How can you add, subtract, and multiply with decimal

What does ( - 1.2) * (0.4) equal?

The minimum monthly payment for Janice's credit card is 2% of her balance or $10, whichever is higher. If Janice's balance at the end of her last billing cycle was $820, what is her minimum monthly payment? A) $16.40 B) $10.00 C) $25.20 D) $5.20

Tessa buys a silver coat rack priced at $224. Shipping and handling are an additional 19 % of the price. How much shipping and handling will Tessa pay?