exam Maths Puzzle Numerical Ability

1. find the product
(2x+5y)^4

I know that it is
1 4 6 4 1

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exam Other Question

The gym is 21 years newer than the auditorium. the gym is also one fourth as old as the auditorium. How old is each building?

(26,27,28) possible ages for auditorium

Write an equation as well as solve.
please help me with these: what intercept procedure do i use for 1/2y=4+x;
determine te slope and y-intercept by inspection y= -7/8x-3
Graph the euations using the slope-inter