3 years ago

To which power must you raise the expression y 1/5 to get y as the result

Mathematics

1 answer:

aleksklad [387]3 years ago

7 0

Answer:

Step-by-step explanation:

Given y^1/5, to get y, the power must be 1. Using the rules of exponents, (y^1/5)^x = y, such that (1/5)x = 1. Therefore, x = 5.

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Least common denominator is 24

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3 years ago

X²-12x+a=(x+b)² find a and b

Valentin [98]

Answer:

Step-by-step explanation:

x² - 12x + a = (x + b)²

x² - 12x + a = x² + 2xb + b²

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2 years ago

Please help me with algebra part B and C. attachment below. Will mark as brainslist. 25 points.

miv72 [106K]

Answer:

C. $(-7x+60)(x+4)$

Step-by-step explanation:

Consider the expression $-7x^2+32x+240.$

First, note that

$a=-7\\ \\b=32\\ \\c=240$

Find the discriminant

$D=b^2-4ac=32^2-4\cdot (-7)\cdot 240=1,024+6,720=7,744\\ \\\sqrt{D}=\sqrt{7,744}=88$

Now,

$x_1=\dfrac{-b+\sqrt{D}}{2a}=\dfrac{-32+88}{2\cdot (-7)}=-4\\ \\x_2=\dfrac{-b-\sqrt{D}}{2a}=\dfrac{-32-88}{2\cdot (-7)}=\dfrac{60}{7}$

Write the factored form:

$-7x^2+32x+240=-7(x-(-4))\left(x-\dfrac{60}{7}\right)=(x+4)(-7x+60)$

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2 years ago

15 arches decreased by 80%

morpeh [17]

If it decreases by 80٪, then only 20٪ remains.

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3 years ago

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3 years ago

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