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3 years ago

Two angles measures of a triangle are 47 and 86, what is the measure of the third angle

Mathematics

1 answer:

andreyandreev [35.5K]3 years ago

4 0

It is A. 47
A sum of a triangle is 180 degrees, add up 47 and 86 you will get 133. 180 subtract 133 gives you 47

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4. Given the data below, where X is the independent variable and Y is the dependent variable. If you

oksian1 [2.3K]

The answer is A, look at the difference between 0 and 15 (15) and the difference between 5 and 10 (5) then divide them 5/15.

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3 years ago

Which is equivalent to 243 2/5? 3 6 9 12

Anna11 [10]

$243^{ \frac{2}{5} } = ( \sqrt[5]{243} )^{2} = 3^{2} =9$

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3 years ago

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What is the equation of the line perpendicular to Y-3x+1 that passes through the point (12,-6)?

erma4kov [3.2K]

Answer:

$3y + x = -6$

Step-by-step explanation:

Given

y = 3x + 1

Required

Equation of line that passes through (12,-6) and is perpendicular to y = 3x + 1

First, the slope of the line has to be calculated;

Th slope of a line is the coefficient of x in its linear equation;

This implies that the slope of y = 3x + 1 is 3

Having calculated the slope of the first line;

The relationship between both lines are perpendicularity; this implies that $m_1 * m_2 = -1$

Where m_1 = 3 and m_2 is the slope of the secodnd line

$m_1 * m_2 = -1$ becomes

$3 * m_2 = -1$

Divide both sides by 3

$\frac{3 *m_2}{m_2} = \frac{-1}{3}$

$m_2 = \frac{-1}{3}$

The equation of the line can be calculated using the folloing formula

$m = \frac{y - y_1}{x - x_1}$

Where $(x_1, y_1) = (12,-6)$ and $m_2 = \frac{-1}{3}$

The equation becomes

$\frac{-1}{3} = \frac{y -- 6}{x - 12}$

$\frac{-1}{3} = \frac{y + 6}{x - 12}$

Cross multiply

$-(x - 12)= 3(y + 6)$

$-x + 12=3y + 18$

Collect like terms

$12 - 18 = 3y +x$

$-6 = 3y + x$

$3y + x = -6$

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3 years ago

Solve the inequality for x. Show each step of the solution.<br> 12X>9(2X-3)-15

agasfer [191]

12x > 18x - 27 - 15
12x > 18x - 42
12x - 18x > -42
-6x > -42
x < -42/-6
two negatives make a positive so now its x < 42/6
Lastly divide 42/6 so it can equal 7

Answer: X < 7.

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3 years ago

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4. What is the circumference of a circle whose area is 81π cm squared?

vichka [17]

Area = pi*r^2
Circumference = 2pi*r

Step 1: find the radius from area
81pi=pi*r^2
81=r^2
9=r

Step 2: plug in radius to the circumference equation

Circumference = 2pi*r

18pi is the answer, otherwise know as 56.52 as well.

7 0

3 years ago

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