17-11-2017
Mathematics

contestada

There are 20 people in Susan’s class. Each person gives a card to everyone else in the class. How many cards were exchanged?

Respuesta :

bgrindle01 bgrindle01

17-11-2017

each student will give 19 cards so 20x19=380

Answer Link

dannielle dannielle

17-11-2017

Every person in the class gives 19 cards
⇒20*19=380 card were exchanged

Answer Link

ACCESS MORE ACCESS MORE ACCESS MORE ACCESS MORE

Otras preguntas

a=1/2 (x+y) make x subject

What is -11/12 + 7/12

11. Which law explains when a person is not wearing a seatbelt and flies through a car window when someone slams on the brakes?

The equation (3x-1)(x+5)=k has two identical real root solutions. Find the value of k.

Due Wed On a bicycle, Rosa started 2 miles from her house, and rides 2 miles per hour away from her house. Write an equation to model this situation (use d for

Which statement is an example of the effect that dwarvish culture has on the story? Bilbo and Thorin become friends when Thorin is dying because Thorin feels so

Marianne works two jobs fora total of 30 hours per week. One job pays $8 and the other job pays $10.50. If her weekly combined pay from the two jobs is $285, fi

what produces the most atp

One-year-old Mark is playing in the living room with his father. Suddenly, loud music blares from the apartment next door. Using the concept of “social referenc

Find the zero of the polynomial function x^3+8x^2-11x-18