exam Maths Puzzle Numerical Ability

How much of a 90% gasloine mix and a 75% gasoline mix are needed for 1200L of an 85% gasoline mixture?

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exam Other Question

Solve the following systems by graphing.

x - 2y = 8
3x - 2y = 12
Hi I need help with this

indicate which quadrant or coordinate axis contains the point.
(a)(3,-5)
(b)(-2,7)
(c)(0,-3)
(d)(-1,-2)
(e)(3,0)
(f)(6,4)