Discover Questions

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? Does NASA still use miles instead of kilometers? Discrete Help ASAP. Please write out symbolic notation.? If a+b+c=4, ab+ac+bc=6, and abc=3, what is 1/a + 1/b + 1/c? How many milliliters of concentrated of sulfuric acid (18 M) are required to make 7.0 L of 0.12M H2SO4?