exam Maths Puzzle Numerical Ability

Solve the following equations.
a) sqrt x-1=3
b)sqrt x^3=8
c)^3sqrt x^2=4

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exam Other Question

Solve and show work.
At 1:00 p.m., a car leaves a city and travels north at a rate of 55 mi/h. An hour later, a second car leaves the city and travels south at a rate of 60 mi/hr. At what time will the two cars be 285 miles apart? (-3)(-6)+(4)(-2)

(-3)to the power of 3 - (-8) (-2)

(-6)to the power of 2 - 4 to the power of 2

-9 to the power of 2 - (6) to the power of 2

-1/2-(5/8)

-3.4-(7.6)