book Maths Puzzle Numerical Ability

USING A COMBINATION OF 24% NITROGEN AND 12% NITROGEN TO ACHIEVE AN END RESULT OF 100 GRAMS OF 21% NITROGEN.

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book Other Question

Determine which two equations represent parallel lines.

a. y = -7x + 1
b. y = 7x + 1
c. y = 1/7x + 1
d. y = -7x + 2 1. The width of a rectangle is 10 feet less than the length, find the length of each side if the perimeter is 100 feet.