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solniwko [45]
2 years ago
12

Sarah’s hand length is 20 cm. She measures the dimensions of her rectangular floor to be 18 by 22 hand lengths. Which of the fol

lowing is the closest to the area of the floor? (A) 160 000 cm2 (B) 80 000 cm2 (C) 200 000 cm2 (D) 16 000 cm2 (E) 20 000 cm2
Mathematics
1 answer:
Temka [501]2 years ago
7 0
Lenght=22 hand*(20 cm/1 hand)=440 cm
width=18 hand*(20 cm/1hand)=360 cm

Area=lenght x width.
Area=440 cm * 360 cm=158,400 cm²≈160,000 cm²

A) 160,000 cm²
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Answer:

The value of g(-6) will be "-9".

Step-by-step explanation:

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⇒  g(x)=x-3

then,

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On putting the value "-6" at the place of "x", then we get

⇒  g(-6) = (-6)-3

⇒            =-6-3

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Thus the above is the correct solution.

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Please help with this Math Question...
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Answer: A

<u>Step-by-step explanation:</u>

f(x) = x³ + 4x² + 7x + 6

possible rational roots are ±{1, 2, 3, 6}

Try x = -2

-2 |   1   4   7   6

   <u>|   ↓  -2  -4  -6</u>

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The factored polynomial x² + 2x + 3 = 0 is not factorable so use the quadratic formula to find the roots.

a=1, b=2, c=3

x=\dfrac{-b\pm\sqrt{b^2-4ac} }{2a}

x=\dfrac{-(2)\pm\sqrt{(2)^2-4(1)(3)} }{2(1)}

x=\dfrac{-2\pm\sqrt{4-12} }{2}

x=\dfrac{-2\pm\sqrt{-8} }{2}

x=\dfrac{-2\pm2i\sqrt{2}}{2}

x = -1 \pm i\sqrt{2}

x = -1 + i\sqrt{2}       x = -1 - i\sqrt{2}

x - (-1 + i\sqrt{2})=0       x - (-1 - i\sqrt{2})=0

The factors are:

(x - 2)[x - (-1 + i\sqrt{2})][x - (-1 - i\sqrt{2})]




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