Efectuati calculele: a) 2√2x√5-3√5x√2+4√5x3√2-5√5x4√2

b) √21 : √7 - 5√15 : √5+2x3√3 - 4√30 : √10

Use the discriminant to determine how many real number solutions exist for the quadratic equations - 4j+3j-28=0

Which angles are linear pairs? Check all that apply

A school has 825 students and 55 teachers. How many students are there per teacher

Here are four questions A) 2/5 B) 2/3 C) 1/4 D) 1/10 put them in order

A certain vine grows at a rate of three inches per day. A researcher starts observing it when t is 27 inches long.

What is 5,000 in scientific notation?

Which of the following is correct set notation? (1,2,3) 1,2,3 {1,2,3} none of the above

The kindergarten teacher wants to divide 1/2 of her classroom into 5 equal sections for stations

A train traveling at 30 miles per hour reaches a tunnel which is 9 times as long as the train. If the train takes 2 minutes to completely clear the tunnel, how long is the train in miles? (1 mile = 5,280 feet)

The cost for 7 dance lessons is $82. the cost for 11 is $122. write a linear equations to find the total cost C for L dance lessons. How much for 4 lessons?