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kolbaska11 [484]
3 years ago
15

Please help me on this!

Mathematics
1 answer:
Likurg_2 [28]3 years ago
6 0

Step-by-step explanation:

no I won't thanks though

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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}\\\\

3 0
3 years ago
Please help me out brainiest and 30 points
Romashka-Z-Leto [24]

Answer:

y = (5/6)x - 7

is with

y = - (6/5)x + 1

y = - (5/6)x - 8

is with

y = (6/5)x - 5

y = - (7/4)x - 1

is with

y = (4/7)x + 9

y = (7/4)x - 2

is with

y = - (4/7)x + 2

Step-by-step explanation:

You can double check by dividing -1 by the number before x. The answer from that calculation will be the number before the x of the perpendicular line's equation

4 0
3 years ago
On a map,the scale shown is 1inch:5miles.If an island is 75 square inches on the map,what is the actual area of the island?
Andreyy89

1 inch = 5 miles

1 square inch =25 square miles

25 square miles x 75 square inches = 1,875 square miles

Answer : 1,875 square miles

5 0
3 years ago
jeremiah is eating at a restaurant he decides too tip the waiter 18% of his meal. if his meal cost $15.00 how much did he pay in
Slav-nsk [51]

Answer:

$17.70

Step-by-step explanation:

$15.00×18%=$2.70

$15.00+$2.70=$17.70

7 0
3 years ago
−4p+9=−5<br><br><br> Plzzzzzzz help
Hoochie [10]

Answer:

p = 3.5 or p = 7/2

Step-by-step explanation:

-4p+9= -5

or, -4p = - 14

or, p = -14/-4

or, p = 7/2 = 3.5

5 0
3 years ago
Read 2 more answers
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