3 years ago

How many classmates does J u l i a n have?

Mathematics

1 answer:

Sav [38]3 years ago

6 0

Answer:

the answer is d

Step-by-step explanation:

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To cover his rectangular backyard, Will needs at least 170.5 square feet of sod.The length of Will’s yard is 15.5 feet.What are

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170.5/15.5= 11 feet

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The price of a set of dog food bowls was $9, but it was increased to $11. What was the percent increase?

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The position of an object at time t is given by s(t) = 1 - 10t. Find the instantaneous velocity at t = 10 by finding the derivat

Karolina [17]

Answer:

-10

Step-by-step explanation:

Velocity is the derivative of position. Derivative is defined as:

f'(x) = lim(h->0) [ f(x+h) - f(x) ] / h

s(t) = 1 - 10t

s(t+h) = 1 - 10(t+h)

Plugging in:

s'(t) = lim(h->0) [ 1 - 10(t+h) - (1 - 10t) ] / h

s'(t) = lim(h->0) (1 - 10t - 10h - 1 + 10t) / h

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s'(t) = -10

v(t) = -10

So at t=0, v(0) = -10.

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4 years ago

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nasty-shy [4]

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Step-by-step explanation:

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3 years ago

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Please help me on this

miss Akunina [59]

Answer: Option a.

Step-by-step explanation:

To rationalize the expression you need to:

Multiply the numerator and the denominator by the conjugate of the denominator.

The conjugate of the denominator is: $\sqrt{x}-\sqrt{7}$

Remember that:

$(\sqrt[n]{x})^n=x\\\\(\sqrt[n]{x})(\sqrt[n]{y})=\sqrt[n]{xy}$

Therefore, multiplying the numerator and the denominator by the conjugate of the denominator ( $\sqrt{x}-\sqrt{7}$ ), you get:

$=\frac{(\sqrt{x})(\sqrt{x}-\sqrt{7})}{(\sqrt{x}+\sqrt{7})(\sqrt{x}-\sqrt{7})}\\\\=\frac{(\sqrt{x})^2-(\sqrt{x})(\sqrt{7})}{(\sqrt{x})^2-(\sqrt{7})^2}\\\\=\frac{x-\sqrt{7x}}{x-7}$

This is the option a.

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4 years ago