A teacher had 21 red pans. If the ratio of red pens to blue pens she owned was was 3:1, how many pens did she have total?

A gumball machine has 280 red gumballs. If the red gumballs are 50% of the total number of gumballs, how many gumballs are in the gumball machine? A. 330 B. 230 C. 560 D. 140

Let C (x, y) mean that student x is enrolled in class y, where the domain for x consists of all students in your school and the domain for y consists of all classes being given at your school.

What is 9h to the - 2 power times 5h to the 10 power

Which ratio is equivalent to the ratio 7:6

1) You are assigned to read War and Peace for your literature class. The edition you have contains 1232 pages. You time yourself and estimate that you can read 12 pages in one hour. You have 5 days before your exam on this book.

A wave has a frequency of 100 Hz and a wavelength of 0.30 m. How do you find the wave speed?

Miguel made a histogram to show the ages of all participants involved in a fundraiser which of the histogram did Miguel forget to create

Y and x have a proportional relationship, and y = 25 when x = 60. What is the value of x when y = 30? -25 -36 -50 -72

2. During a 5-day training at your department, the number of visitors tripled each day. If the training started on a Monday with 345 attendees, what was the attendance on Thursday?

If prices increase at a monthly rate of 3.8 %, by what percentage do they increase in a year?