A12.9 Adv Weekly Review

Front

What is the equation to find the temperature at midnight if the temperature at 10 p.m. is -3 degrees Fahrenheit and it decreases by 8 degrees?

Back

-3 + (-8) = -11

Front

What is a proportional relationship?

Back

A proportional relationship is one where two quantities maintain a constant ratio. For example, if Colin has no savings and starts earning $10 each week doing chores, his savings increase proportionally with time.

Front

How do you convert scale measurements to actual measurements?

Back

To convert scale measurements to actual measurements, multiply the scale measurement by the scale factor. For example, if 1 cm equals 4 meters and the drawing is 12.5 cm by 10 cm, the actual size is 12.5 cm * 4 m/cm = 50 m and 10 cm * 4 m/cm = 40 m.

Front

What does the expression -2 + 3 represent on a number line?

Back

The expression -2 + 3 represents moving 3 units to the right from -2 on a number line, resulting in 1.

Front

What is the definition of a negative number?

Back

A negative number is a number that is less than zero, often used to represent a loss or a decrease.

Front

What is the definition of a scale drawing?

Back

A scale drawing is a representation of an object where the dimensions are proportional to the actual dimensions, allowing for a smaller or larger version of the object.

Front

What is the formula for calculating the total temperature change?

Back

Total temperature change can be calculated by adding the initial temperature to the change in temperature. For example, if the initial temperature is -3 degrees and it decreases by 8 degrees, the total change is -3 + (-8).

Front

What is the meaning of 'decrease' in mathematical terms?

Back

In mathematical terms, 'decrease' means to subtract or reduce a quantity.

Front

What is the difference between a fixed amount and a proportional amount?

Back

A fixed amount is a constant value added or subtracted, while a proportional amount changes based on a ratio or percentage of another quantity.

Front

How do you identify a proportional relationship from a set of options?

Back

To identify a proportional relationship, look for a situation where the ratio between two quantities remains constant as one quantity changes.