05-04-2017
Mathematics

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How can I solve each system of liner equations by substitution?

How can I solve each system of liner equations by substitution class=

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kyleighlauren357 kyleighlauren357

05-04-2017

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Please help, the questions are now attached

Atoms of which element can bond to each other to form chains, rings, and networks? (1) carbon (3) hydrogen (2) fluorine (4) oxygen

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The nucleus of one boron atom has five protons and four neutrons. Determine the total number of electrons in the boron atom.

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Which statement describes electrolysis? (1) Chemical energy is used to produce an electrical change. (2) Chemical energy is used to produce a thermal change. (3

What unit is used to express the pressure of a gas?(1) mole (2) joule (3) kelvin (4) pascal

What is the approximate circumference of a circle with a radius of 20 inches? Use π ≈ 3.14. A. 125.6 inches B. 62.8 inches C. 251.2 inches D. 120 inches