in a batch of 280 water purifiers, 12 were found to be defective. what is the probability that a water purifier chosen at random will be defective.

130 apples at the party. There were 3 times as many yellow apples as green apples, there were twice as many red apples as yellow apples. How many red apples were at the party

Each lap around the track is 400 meters. How many meters does someone run if they run x laps?

Tina uses a $50 gift certificate to buy a pair of pajamas for $17.97, a necklace for $25.49, and 3 pairs of socks that each cost the same amount. Tina has to pay $0.33 because the gift certificate does not cover the total cost of all the items.

Vivian worked 19 hours more than Malik last month. If Vivian worked 7 hours for every 2 hours that Malik worked, how many hours did they each work? Note: these are proportion problems

Anita brings 6 dolls to her grandma house. These dolls represent 20% of Anita's doll collection shown in the diagram. What is the total number of dolls in Anita's doll collection?

What is 296 times 35?

One-half of the dogs in each shelter are between which weights? O between 8 and 30 pounds in shelter A; between 10 and 28 pounds in shelter B O between 8 and 17 pounds in shelter A;

What is the square root of 4356

The cost of a telephone call is $0.75 + $0.25 times the number of minutes. Write an algebraic expression that models the cost of a telephone call that lasts t minutes

Use the function rule to complete the table -10x+y=4 the chart is below i coppied it X = - 2, - 1, 0, 1, 2 y=is blank so you have to complet the bottom part witch is y.