7th Unit 1 & 2 Review (IReady)

Front

What equation represents the cost of the food-delivery service?

Back

The equation is c = 60w, where c is the total cost and w is the number of deliveries.

Front

How do you calculate the distance between two points on a vertical line?

Back

To find the distance, subtract the lower point from the higher point. For example, if one point is -12.6 ft and the other is 2.7 ft, the distance is |2.7 - (-12.6)| = 15.3 ft.

Front

What is a proportional relationship?

Back

A proportional relationship is one where two quantities maintain a constant ratio. For example, if A is doubled, B is also doubled.

Front

How do you find the missing value in a proportional relationship?

Back

Set up a proportion using known values and solve for the missing value. For example, if A = 1 and B = 44, and A = 2, then B = 88.

Front

What is the formula to find the total amount needed to save for a purchase?

Back

Total amount needed = Cost of item - Amount saved. For example, if an item costs $181.75 and $34.75 is saved, then $181.75 - $34.75 = $147.

Front

How do you express a ratio?

Back

A ratio compares two quantities. For example, if Joe needs to save $147 and saves $10.50 per week, the ratio is 147/10.50.

Front

What is the sum of two negative numbers?

Back

The sum of two negative numbers is also negative. For example, -26 + -37 = -63.

Front

What does it mean to solve an equation for a variable?

Back

Solving an equation for a variable means isolating that variable on one side of the equation. For example, in c = 60w, to solve for w, you would rearrange it to w = c/60.

Front

How do you calculate the total cost of a service based on a rate?

Back

Total cost = Rate per unit * Number of units. For example, if the rate is $60 per delivery and there are w deliveries, then total cost c = 60w.

Front

What is the significance of negative numbers in real-world contexts?

Back

Negative numbers can represent values below a reference point, such as temperatures below zero or depths below sea level.