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VMariaS [17]
3 years ago
15

Choose the correct simplification of the expression (−2x 8y)(9x − 3y).−18x2 78xy − 24y218x2 78xy − 24y2−18x2 − 78xy 24y2−18x2 72

xy − 24y2
Mathematics
1 answer:
Sedbober [7]3 years ago
3 0
The last one -18x2 72xy -24y2
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Mai makes her favorite shade of green paint by using 5 cups of blue paint for every 3 cups of yellow paint. Priya makes her favo
Lelechka [254]

Answer:

Priya

Step-by-step explanation:

Mai= 5:3 Priya=7:5

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6 0
3 years ago
Simplify the expression ((81y^-8)/(16x^20))^-1/4
Darina [25.2K]
\bf ~~~~~~~~~~~~\textit{negative exponents}
\\\\
a^{-n} \implies \cfrac{1}{a^n}
\qquad \qquad
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\qquad \qquad 
a^n\implies \cfrac{1}{a^{-n}}
\\\\
-------------------------------

\bf \left( \cfrac{81y^{-8}}{16x^{20}} \right)^{-\frac{1}{4}}\implies \left( \cfrac{16x^{20}}{81y^{-8}} \right)^{\frac{1}{4}}\implies \left( \cfrac{2^4x^{20}}{3^4y^{-8}} \right)^{\frac{1}{4}}
\\\\\\
\textit{and now we'll distribute the exponent}\qquad \left( \cfrac{2^{4\cdot \frac{1}{4}}x^{20\cdot \frac{1}{4}}}{3^{4\cdot \frac{1}{4}}y^{-8\cdot \frac{1}{4}}} \right)
\\\\\\
\cfrac{2^1x^5}{3^1y^{-2}}\implies \cfrac{2^1x^5y^2}{3^1}\implies \cfrac{2x^5y^2}{3}
6 0
3 years ago
a rectangular garden of length 14m and width 10m. The flower bed is a triangle and the vegtables patch is a trapezium. out the a
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Answer:

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8 0
3 years ago
Assume that you select 2 coins at random from 8 coins: 5 dimes and 3 quarters.
Vilka [71]
If the coins are selected without replacement, the probability of 2 dimes is:\frac{5}{8}\times\frac{4}{7}=\frac{5}{14}
The answer is 5/14.
Using the formula for a hypergeometric distribution, we get:
P(2\ dimes)=\frac{5C2\times3C0}{8C2}=\frac{5}{14}
7 0
3 years ago
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