exam Maths Puzzle Numerical Ability

can you please show me the steps on soloving this problem and its solution thank you!

x^2-20x+75=

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exam Other Question

What is the slope and graph for this problem?

y=px+d

where y is the total cost for the chairs
where p is the price per chairs
where x is the number of chairs
where d is t Please help with fraction equation. 5/3u=2/9