exam Maths Puzzle Numerical Ability

find an equation in the form y=mx+b
through (-7,4), perpendicular to y=8

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exam Other Question

Anna has 12 bills in her wallet, some $5 and some $10. The total value of the bills is $100. How many of each bill does Anna have?
YIKES please help me with this one. 32ft/hr= ?yd/day