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3 years ago

10

The circumcenter is the intersection point of the _______ bisectors of the sides of the triangle. Question 4 options: parallel p

erpendicular angle bisector

1 answer:

Arada [10]3 years ago

5 0

Answer:

Perpendicular

Step-by-step explanation:

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The decimal representation of<br>3/1

Ymorist [56]

Answer:

3

Step-by-step explanation:

8 0

3 years ago

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What is a common denominator for 1/7 and 1/3?<br><br> a 18<br> b 21<br> c 3<br> d 4

Nataliya [291]

Answer:

B. 21

Step-by-step explanation:

The fractions are there to just make the problem seem complicated, but just rewrite it without the fractions.

"What is a common multiple for 7 and 3?"

In this problem it's easy, all you have to do is guess and check.

A: A doesn't work. 7 is not a factor of 18.

B: B works! Both 3 and 7 are factors of 21.

C: C doesn't work. 7 is not a factor of 3.

D: D doesn't work. Neither are a factor of 4.

They only leave us with one solution, B.

6 0

3 years ago

Let u and v be the solutions to 3x^2 + 5x + 7 = 0. Find u/v+v/u

Hitman42 [59]

Answer: $\dfrac{-17}{21}$

Step-by-step explanation:

Given: u and v be are the solutions of $3x^2+5x+7=0$

Let $ax^2+bx+c=0$ is the quadratic equation and u and v are the zeroes/solutions then

Sum of zeroes; $u+v = \dfrac{-b}{a}$

Product of zeroes; $uv= \dfrac{c}{a}$

Comparing $3x^2+5x+7=0$ to $ax^2+bx+c=0$

we get a= 3 , b= 5 and c = 7

$u+v = \dfrac{-b}{a} = \dfrac{-5}{3}----(i)$

$uv= \dfrac{c}{a} = \dfrac{7}{3}----(ii)$

Now we have to find

$\dfrac{u}{v} +\dfrac{v}{u} =\dfrac{u^2+v^2}{uv}$ adding and subtracting 2uv in numerator we get

$= \dfrac{u^2+v^2+2uv-2uv}{uv}= \dfrac{(u+v)^2-2uv}{uv}$

Substituting the values from (i) and (ii) we get

$\dfrac{(\dfrac{-5}{3} )^2-2\times \dfrac{7}{3} }{\dfrac{7}{3} } = \dfrac{\dfrac{25}{9} -\dfrac{14}{3} }{\dfrac{7}{3} }= \dfrac{\dfrac{25-42}{9} }{\dfrac{7}{3}} =\dfrac{-17}{9} \times \dfrac{3}{7} = \dfrac{-17}{21}$

Hence, the value of $\dfrac{u}{v} +\dfrac{v}{u}$ is $\dfrac{-17}{21}$

5 0

4 years ago

28 is 35% of what number?

Fofino [41]

28 is 35% of 80

Convert the percentage (35) into a decimal by dividing it over 100:
$\frac{35}{100} = 0.35$

Divide 28 over 0.35:
$\frac{28}{0.35} = 80$

7 0

3 years ago

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Describe all the numbers that when rounded to the nearest thousand are 645,000. Please help due tomorrow giving 10 points

Dafna11 [192]

That rounds to 645, 000 -644,999

4 0

3 years ago

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