exam Maths Puzzle Numerical Ability

graph the inequality
3x+y<=5

y=3x+5

are the coordinates (1,3) and (1,5)

please help, I am confused

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exam Other Question

find (x - 7)2

and

which of the following is a pattern for squaring a binomial, a + b?
a. a2 + 2ab + b2
b. a2 +b2
c. a2 + ab + b2
d. a2 - b2 A carpenter caut an 8-foot board into two pieces. The length of one of the pieces must be three times the length of the other piece.

Make a drawing and write a segment addition equation to model the board lengths.