Flashcard Review: Math 7

Front

What is the cross-multiplication method used for solving proportions?

Back

Cross-multiplication involves multiplying the numerator of one fraction by the denominator of the other fraction and setting the two products equal to each other.

Front

Back

x = 98

Front

What is the formula to find the total time taken to produce a certain number of items at a constant rate?

Back

Total Time = (Total Items / Rate of Production) * Time Period.

Front

If a shop produces 39 wetsuits every 2 weeks, how many wetsuits does it produce in one week?

Back

19.5 wetsuits per week.

Front

Back

x = 38

Front

What is the formula to calculate the number of days needed to finish reading a book?

Back

Days = Total Pages / Pages per Day.

Front

If Mr. V reads 50 pages per day, how many pages does he read in 14 days?

Back

700 pages.

Front

What is a direct variation?

Back

A relationship where one variable is a constant multiple of another, expressed as y = kx.

Front

If the waiting time for 150 people is 20 minutes, how do you find the waiting time for 1,200 people?

Back

Use direct variation: Waiting Time = (Number of People / 150) * 20 minutes.

Front

Solve for waiting time when 1,200 people are in line if 150 people take 20 minutes.

Back

160 minutes.