3 years ago

There are 28 students in the math class, and 22 of the students passed recently. What percentage did the test pass?

Mathematics

1 answer:

marissa [1.9K]3 years ago

8 0

About 79% passed

Hope this helps

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The two shorter sides of a triangle are the same length. The length of the longer side is 5 m longer than each of the shorter si

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Here's my answer! :)

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3 years ago

The general form of a circle is given as x^2+y^2+4x - 12y + 4 = 0. A) What are the coordinates of the center of the circle? B) W

Alex_Xolod [135]

Answer:

center = (-2, 6)

radius = 6

Step-by-step explanation:

<u>Equation of a circle</u>

$(x-a)^2+(y-b)^2=r^2$

(where (a, b) is the center and r is the radius)

Therefore, we need to rewrite the given equation into the standard form of an equation of a circle.

Given equation:

$x^2+y^2+4x-12y+4=0$

Collect like terms and subtract 4 from both sides:

$\implies x^2+4x+y^2-12y=-4$

Complete the square for both variables by adding the square of half of the coefficient of $x$ and $y$ to both sides:

$\implies x^2+4x+\left(\dfrac{4}{2}\right)^2+y^2-12y+\left(\dfrac{-12}{2}\right)^2=-4+\left(\dfrac{4}{2}\right)^2+\left(\dfrac{-12}{2}\right)^2$

$\implies x^2+4x+4+y^2-12y+36=-4+4+36$

Factor both variables:

$\implies (x+2)^2+(y-6)^2=36$

Therefore:

center = (-2, 6)
radius = √36 = 6

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givi [52]

Yay yay you got this

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The answer is A.

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Any angle that would be less than 80 degrees would be known to be called an "Acute Angle". Therefore, your correct answer would then be known to be called an Acute Angle.

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3 years ago

There are 28 students in the math class, and 22 of the students passed recently. What percentage did the test pass?​

There are 28 students in the math class, and 22 of the students passed recently. What percentage did the test pass?