exam Maths Puzzle Numerical Ability

A school sent 5 students to a spelling bee.The team was made up of 4 people.How many different teams of 4 students could be sent?

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exam Other Question

Over what interval of the domain is this function decreasing: f(x) = x + 4?
@ This linear function is always increasing; m > 0. Identify intervals on which a function increases, d Please help me factor the polynomial 49+112y+64y^2