3 years ago

I need help please!

Mathematics

2 answers:

lesantik [10]3 years ago

6 0

Answer:

the correct answer is true

Elis [28]3 years ago

4 0

True the first box is the right answer

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KiRa [710]

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Step-by-step explanation:

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The point P = (x, - 2/7) lies on the unit circle shown below. What is the value of x in simplest form?

miskamm [114]

Answer: $x = \frac{3\sqrt{5}}{7}\\\\$

Explanation:

The equation of the unit circle is $x^2+y^2 = 1\\\\$

Plug in y = -2/7 and solve for x

$x^2+y^2 = 1\\\\x^2+\left(-\frac{2}{7}\right) = 1\\\\x^2+\frac{4}{49} = 1\\\\x^2 = 1-\frac{4}{49}\\\\x^2 = \frac{49}{49}-\frac{4}{49}\\\\x^2 = \frac{45}{49}\\\\x = \sqrt{\frac{45}{49}} \ \ \text{ ... x is positive}\\\\x = \frac{\sqrt{45}}{\sqrt{49}}\\\\x = \frac{\sqrt{9*5}}{7}\\\\x = \frac{\sqrt{9}*\sqrt{5}}{7}\\\\x = \frac{3\sqrt{5}}{7}\\\\$

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3 years ago

A bookstore manager marks down the price of older hardcover books, which originally sells for b dollars, by 48%.

Alecsey [184]

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3 years ago

5 point

nadya68 [22]

Answer:

C table one hope this helps ya

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3 years ago

I need help please! ​

I need help please!