For a normal distribution curve with the mean of 15 and a standard deviation of 5, which range of the variable defines an area under the curve corresponding to a probability of approximately 68%?

There are 8 teachers and 40 students going on a field trip. If 20 more students decided to go on the field trip, then how many more teachers must go to keep it proportional? A. 5 more teachers B. 4 more teachers C. 2 more teachers D. none

Simplify the expression 9-8b+6b 9-8b+6b . 9-8b+6b=? haha last one XD

You are told that the value of a car of the given model, based on its age, is less than $6000. Give a range of values that could represent the age of the car.

The perimeter of a rectangular concrete patio is 68 meters. The patio is 24 meters long. how wide is it?

Combine like terms y+6+5 (y+8)

Factorise a) x + 3x - 4

Find the radian measure of an angle of - 280° A) (9/-14π) B) (-14π/9) C) (9π/-14) D) (-14/9π)

Find the discriminant of x^2+4x-32=0

Jamil has 3 pet lizards. The pet store owner said that Jamil will need to buy a total of 36 crickets to feed his lizards. If each lizard eats the same number of crickets, how many crickets does each lizard eat?

Fatima wants to purchase a scarf for $45 and a sweater for $77.50 if she currently has $100 how much more money does she need to purchase the two items