3 years ago

What is the height of an equilateral triangle with sides taht are 12 cm long? round to the nearest tenth?

Mathematics

2 answers:

ch4aika [34]3 years ago

3 0

10.4 is the correct answer!!!!

pantera1 [17]3 years ago

3 0

Answer: B.) 10.4 is correct

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Point b has coordinates (-8,15) and lies on the circle whose equation is x^2+y^2=289. If an angles is drawn in standard position

Alenkinab [10]

Answer:

$\cos \theta=-\dfrac{8}{17}$

Step-by-step explanation:

Coordinates of Point b $=(-8,15)$

b lies on the circle whose equation is $x^2+y^2=289$

$x^2+y^2=17^2$

Comparing with the general form a circle with center at the origin: $x^2+y^2=r^2$

The radius of the circle =17 which is the length of the hypotenuse of the terminal ray through point b.

For an angle drawn in standard position through point b,

x=-8 which is negative

y=15 which is positive

Therefore, the angle is in Quadrant II.

$\cos \theta=\dfrac{Adjacent}{Hypotenuse} \\$Adjacent=-8\\Hypotenuse=17\\\cos \theta=\dfrac{-8}{17} \\\cos \theta=-\dfrac{8}{17}$

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3 years ago

2. What is the x-value to the solution for the system of equations y = -5x - 9 and y = 2x<br> + 5.

pav-90 [236]

Answer:

The x-value is -2

Step-by-step explanation:

U can substitute any of the equations for y

-5x + (-9) = 2x + 5

-9 = 7x + 5

-14 = 7x

-2 = x

x = 2

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3 years ago

E^x = 25 <br><br> ...................

anzhelika [568]

X is equal to about 3.218876

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3 years ago

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A number divided by 12 is equal to 27

Rasek [7]

Answer:

x = 324

Step-by-step explanation:

$\frac{x}{12}$ = 27, where x is the unknown number

multiply both sides by 12:

x = 324

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Justin and Desiree each wrote a ratio comparing the numbers of students and tables in their classroom. There are 6 tables in the

blondinia [14]

Answer:

24;6

Step-by-step explanation:

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