how do i know whether to subtract or divide when isolating a number? (example, 2a, do i subtract or divide?)

What is an equation of a circle with center (2,7) and radius 4?

Maria is learning to play golf. She has been working particularly hard on driving. Before lessons, her drive average 240 yards. After her first lesson, her drives increase 25%. After her second lesson, they increase another 25%.

2. Jessica's grandparents gave her $2000 for college to put in a savings account until she starts college in four years. Her grandparents agreed to pay her an additional 7.5% simple interest on the $2000 for every year.

What is the unit rate for 4 green peppers cost 7.65

What does it mean by 2cm:1unit on a graph

Find the equation of the line that cuts the y axis at y=-9 and whose slope is 1/7.

Math is often used to determine the correct dosage for medications; create scale drawings; graph data from scientific investigations. Given this information, what conclusion can be made about mathematics? A.

A car is 200 km from its destination after 1 hour and 80 km from its destination after 3 hours.

Consider the equation x-3=5. a. Multiply both sides of the equation by a constant, and show that the solution set did not change. Now, multiply both sides by x. b. Show that x=8 is still a solution to the new equation.

A gardener uses a tray of 6 conical pots to plant seeds. each conical pot has a radius of 3 centimeters and a depth of 8 centimeters. about how many cubic centimeters of soil are needed to plant the full tray? round to the nearest cubic centimeter.