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Mathematics 15 Online
OpenStudy (anonymous):

help @Nnesha

OpenStudy (anonymous):

What is the simplified form of 15 times x to the sixth power over 20 times y to the fifth power times the fraction 6 times y-squared over 5 times x to the fourth power ? 9 x-squared over 10 y-cubed 9 x cubed over 10 y-squared 10 x cubed over 9 y-squared 10 x squared over 9 y-cubed

OpenStudy (campbell_st):

so the question is \[\frac{15x^6}{20y^5} \times \frac{6y^2}{5x^4}\] so if you simplify it you get \[\frac{90x^6y^2}{100x^4y^5}\] start by simplfying 90/100 = then with the powers, use the index law for division, subtract the powers for the same base \[\frac{x^a}{x^b} = x^{a - b}\] if you get a negative power it just indicates a fraction \[x^{-a} = \frac{1}{x^a}\] hope it helps

OpenStudy (anonymous):

@Nnesha can you help i dont get ot

Nnesha (nnesha):

everything is there! :-) reread that

OpenStudy (anonymous):

i dont understand it

Nnesha (nnesha):

tell me what part u don't get 4rm that ? i have nothing to add :-)

Nnesha (nnesha):

divide 90/100= ?? keep it in fraction form reduce the fraction

Nnesha (nnesha):

if there are same bases at the denominator and numerator you have to use exponent rule \[\huge\rm \frac{ x^a }{ x^b } = x^{a-b}\]

Nnesha (nnesha):

for example \[\rm \frac{ 3^3 }{ 3^2 } = 3^{3-2}\]

OpenStudy (anonymous):

okay so i got 9x^3/10y^3

OpenStudy (anonymous):

like when i used a calculator idk this one is confusing

Nnesha (nnesha):

in other words x^6 can be written as \[\huge\rm \frac{ x \times x \times x \times x \times x \times x }{ x \times x \times x \times x }\] now cancel x's

Nnesha (nnesha):

when you multiply same bases u should their exponent so that's how we can factor x^6

Nnesha (nnesha):

|dw:1433721432895:dw| like this so \[\huge\rm \frac{ x^6 }{ x^4 } = ?\]

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