- What is the molarity of Ca(OH)2 if 15 mL is neutralized with 120 mL of 0.1 M H2SO4?

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7^(x+1) + 7^x + 7^(x-1) = 399, what is x? Describe how and where new crust material is made. Describe how and where old crust is destroyed.? If x^2+y^2 = 6, and x+y=3, then what is x^3+y^3? Could someone help me with these math problems? I can't figure them out. Solve the linear equation;
x+2y=15
y=-2x+0 9x-12y=-3
-12x+16y=4? What day will it be exactly 6 months from June 14th, 2017? Best answer gets buncha stars?