exam Maths Puzzle Numerical Ability

Translate the following statement into an algebraic equation. Let x represent the number.
1 more than a number is 7

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exam Other Question

write in exponential form the 4th root of (16^3 * a^-2)/b^6

so far I got that it has simplified to 16^3/4 * a^-1/2 * b^ 2/3, but I am not sure if the b^2/3 is right.
The simple interest(in dollars) for a savings account is jointly proportional to the product of the time (in years) and the principal (in dollars). After nine years the interest on