3 years ago

Determine Whether This Ratio Are Proportional. 5/6 , 15/18

1 answer:

5 0

They are proportional, since in 5/6 if you multiply both the numerator and denominator by 3, you get 15/18.

$\frac{5}{6} = \frac{5(3)}{6(3)} = \frac{15}{18}$

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x varies jointly with the square of y and z. when y=6 and z=5, x=100. Then, what is x when y=8 and z=2?

djyliett [7]

X = k*y^2 * z
100 = 6^2*5*k,
k=0.555
x=0.555zy^2

x=o.555(8^2)(2)=71.1112.

Hope that helps!

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4 years ago

What is the volume of a right circular cylinder with a radius of 5 cm and a height of 12 cm?

dexar [7]

Answer:

Answer C

Step-by-step explanation:

Formula

Volume = pi * r^2 * h

Givens

r = 5 cm
h = 12 cm

Solution

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Step-by-step explanation:

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ra1l [238]

Answer:

Step-by-step explanation:

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4 years ago

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Solve the following quadratic by<br> completing the square.<br> y = x2 - 6x +2

Nana76 [90]

Answer: $3 \pm \sqrt{7}$

Step-by-step explanation:

$1) \text{ } x^{2}-6x+2=0\\\\2) \text{ } x^{2}-6x=-2\\\\3) \text{ } x^{2}-6x+\left(\frac{-6}{2} \right)^{2}=-2+\left(\frac{-6}{2} \right)^{2}=7\\\\4) \text{ } (x-3)^{2}=7\\\\5) \text{ } x-3 =\pm \sqrt{7} \longrightarrow \boxed{3 \pm \sqrt{7}}$

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