How can i explain that i am useing multiplication to solve the proportion

A recent poll of 380 randomly selected Americans showed that 24% ( = 0.24) are happy with their cell phone carriers. The country's largest cell phone carrier would like to know, within a 90% confidence level, the margin of error for this poll.

3x+y=4 x+2y=-2 what is the answer

How many square feet of wood will Donald use to construct the planter? A) 5.25 square feet B) 6 square feet C) 7.5 square feet D) 9.75 square feet

The expression 3j+10 shows the total cost with shipping for 3 pair of jeans. Find total cost of each pair costs 25 dollars

Factor the sum of terms as a product of the GCF and a sum 18 + 20

What is the next number in the sequence of 12, 13, 15, 17, 111, 113, 117, 119, 123?

There are 6 gray keys for every seven blue keys write the possible ratios for gray to black keys

What formula do you use to find the volume of a triangle with a triangle base?

What is 6.825 as a mixed number in simplest form

Mark wants to paint a mural he has one and 1/3 gallons of yellow paint 1 1/4 gallon of green paint and 7/8 gallons of blue paint mart plans plans to use 3/4 gallons of each paint color how many gallons of paint will he have left after painting the