Which of the following represents an element ? H2O H2 NaCl CaCO3

I need help!!!! :)))) Abby went to the store to buy ice cream for her party. Each box costs $3. She has a coupon for 20% off her total. If Abby buys 3 boxes, what will she pay after using the coupon? Use the Pythagorean Theorem to find the length of the leg in the triangle shown below. The figure shows a right triangle with one leg marked 8. The hypotenuse is marked 10. The figure shows a right triangle with one leg marked 8. The hypotenuse is marked 10. According to the graphic above, which form of media do people use most to get their news from? Below is a list of numbers. Use them to answer question 3.2, 19, 31, 43, 59, 67Question 3*What type of numbers are shown?AB.C.composite numberseven numbersodd numbersprime numbersD. pls help me i have to have assignments by 11:00pm so pls help me 6 + {1 + [(3 + 5) 8] + 2} + 10 pleasee!!! 1. A square is lengthened by 6 units in one direction and by 5 units in the otherdirection to make a rectangle, as shown in the diagram. The length of the sideof the original square is x units. What is the area of the whole new rectangle? Why did the author choose to provide this fictionalaccount of Iqbal Masih, who was a real person? Select4 options. Need help with this :( in the mid-1800s different regions have different needs and interests match each region to the correct description trnh by c ch hp th v chuyn ha lipid t ng tiu ha ngi? Help plz I dont get it Which of these would be the opposite of a progressive tax? the presence of ____ in Andes mountains shows that mountains must have risen above the ocean.1) Animals2) Shells3) Plants 4) None of the above Votre animal est malade, vous l`emmenez chez le vtrinaire .Ecrivez un dialogue entre vous et le vtrinaire.answer fast plzzzzzz How did slaves in Texas gain their freedom? Why were some former slaves fearful after learning of their freedom? In the presence of excess iodide ions, the iodine formed by reaction of iodide with NBS will react further to form triiodide ions. What does the triiodide combine with to form the blue color of the endpoint please help picture included Match the verbal expression (term) with its algebraic expression (definition). Match Term Definition Some number A) a = 2 increased by two A variable decreased B) b + 2 by two Product of an C) y2 unknown value and two D) X - 2 Quotient of some number and two An unknown value E) 22 squared math pls pls help help no trolls i really need this grade