exam Maths Puzzle Numerical Ability

how do you put the 4th root of 81 into a TI-84 plus calculator?

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exam Other Question

Find the solutions to the equation: x − 5/4 = 4

a. x = -1, 4
b. x = -1, 5
c. x = 1, 4
d. x = 1, 5 I need help working out these equations. My teacher made these problems up.
-8+t/3=7

4(x+3)=20

4y+3
_____ =9
7