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Yuri [45]
3 years ago
14

Answer this for me plzzzzzzz

Mathematics
1 answer:
kramer3 years ago
8 0
Base times height divide by 2. 5 times 8= 40/2=20
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The price for a gallon of gas is $4.99 how much is it going to cost for 20 gallons ?
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Which shows how to find the value of this expression when x=-2 and y=5? <br> (3x^3y^-2)2
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Put x = -2 and y = 5 to the expression.

(3x^3y^{-2})^2

\left[3\cdot(-2)^3(5)^{-2}\right]^2=\left[3(-8)\cdot\dfrac{1}{5^2}\right]^2=\left(-24\cdot\dfrac{1}{25}\right)^2=\left(-\dfrac{24}{25}\right)^2\\\\=\dfrac{24^2}{25^2}=\dfrac{576}{625}

explanation

(-2)^3=(-2)(-2)(-2)=-8\\\\a^{-n}=\dfrac{1}{a^n}\to5^{-2}=\dfrac{1}{5^2}=\dfrac{1}{(5)(5)}=\dfrac{1}{25}\\\\a^2\geq0\ \text{for any real number}\to\left(-\dfrac{24}{25}\right)^2=\left(\dfrac{24}{25}\right)^2\\\\\left(\dfrac{a}{b}\right)^2=\dfrac{a^2}{b^2}\to\left(\dfrac{24}{25}\right)^2=\dfrac{24^2}{25^2}=\dfrac{(24)(24)}{(25)(25)}=\dfrac{576}{625}

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4 years ago
2 7/10 as a decimal please again I’m sorry
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2.7 would be 2 7/10. Correct?

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