Question

solve

Answer 1

would these be the same principal they dont seem the same

Answer 2

well they do involve many of the same things.....

In the first one and the last one... the 3 is separate or is it cuberoot???

Answer 3

is it\[3\sqrt{?} or \sqrt[3]{?}\]

Answer 4

for the right triangle.... a= 15 and b = 15

c² = a² + b² = 15² + 15² = 225 + 225 = 450
so
c = sqroot(450) __
exact value of c = sqroot(2*3*3*5*5) = 3*5*sqroot(2) = 15√2
in decimals, value of c = 21.21320....
so approximate vale to 3 decimal places is 21.213
rounded to nearest thousandth = 21.213

Answer 5

\[8\sqrt{12} - 7\sqrt{3} = 8\sqrt{2*2*3} - 7\sqrt{3} = 8*2\sqrt{3} - 7\sqrt{3}\]
\[16\sqrt{3} - 7\sqrt{3} = (16 - 7)\sqrt{3} = 9\sqrt{3}\]

Answer 6

it is not separate in the first or last one

Answer 7

cuberoot(56)
------------ = cuberoot(56/7) = cuberoot(8) = 2 [becoz 2^3 = 8]
cuberoot(7)

Answer 8

\[\sqrt[3]{2x + 9 + 3} = 9\]
cubing both sides, we get
2x + 12 = 729
2x = 729 - 12
x = 717/2
x = 358.5

Answer 9

\[\sqrt[3]{40x ^{3}} = \sqrt[3]{2*2*2*5*x ^{3}} = 2x \sqrt[3]{5}\]