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3 years ago

7

In trying to calculate the product of 5 and 12

2 answers:

Leno4ka [110]3 years ago

7 0

Answer:

60

Step-by-step explanation:

5x12 is 60.

shusha [124]3 years ago

6 0

60 hope that helps good luck:)

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2x² - 5x+1 has roots alpha and beta. Find alpha⁴+beta⁴ without solving the equation.

shepuryov [24]

Answer:

Step-by-step explanation:

$\alpha+\beta=\dfrac{5}{2} \\\\\alpha*\beta=\dfrac{1}{2} \\\\\alpha^2+\beta^2=\dfrac{21}{4} \ (see\ previous\ post)\\\\(\alpha+\beta)^4=\dfrac{625}{16} \\\\=\alpha^4+\beta^4+4*\alpha^3*\beta+6*\alpha^2*\beta^2+4*\alpha*\beta^3\\\\=\alpha^4+\beta^4+4*(\alpha*\beta)(\alpha^2+\beta^2)+6*\alpha^2*\beta^2\\\\\alpha^4+\beta^4=(\alpha+\beta)^4-4*(\alpha*\beta)(\alpha^2+\beta^2)-6*\alpha^2*\beta^2\\\\= \dfrac{625}{16} -4*\dfrac{1}{2} *\dfrac{21}{4} -6*(\dfrac{1}{2})^2 \\\\$

$= \dfrac{625}{16}- \dfrac{168}{16}-\dfrac{24}{16}\\\\\\= \dfrac{433}{16}$

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3 years ago

Solve for X Cosine 59 degree angle the adjacent is 16

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Answer:

Step-by-step explanation:

J we be w e e e e d. D

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2 years ago

Express the square root of -80 in its simplest terms.

spin [16.1K]

Answer:

C

Step-by-step explanation:

noting that $\sqrt{-1}$ = i

Given

$\sqrt{-80}$

= $\sqrt{16(-1)(5)}$

= $\sqrt{16}$ × $\sqrt{-1}$ × $\sqrt{5}$

= 4i $\sqrt{5}$ → C

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3 years ago

Fiona and her friends are playing a game by guessing where a coin will land when it is randomly dropped inside the square shown

azamat

Answer:

Step-by-step explanation:

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3 years ago

Read 2 more answers

Worth 10pts!!! Can someone help?

gulaghasi [49]

Answer:

-4

Step-by-step explanation:

The average rate of change of the interval [a,b] is (f(b)−f(a)) / (b−a)

Replacing a=−5, b=4, f(x)=−x^2−5x+12.

(f(b)−f(a))/(b−a) =12−5x4− 4^2 − (12−5 x(−5)−(−5)^2)/ (4−(−5))= −4.

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2 years ago