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3 years ago

Ab= AD and BC=DC Y=?

Mathematics

2 answers:

Tems11 [23]3 years ago

5 0

Y=63 and what the other person said

Galina-37 [17]3 years ago

3 0

Answer:

y = 63°

Step-by-step explanation:

ABCD is a kite.

The main diagonal BD bisects the opposite angles, thus

∠ DBC = ∠ DBA = 35°

The sum of the 3 angles in Δ BCD = 180° , thus

y = 180° - (35 + 82)° = 180° - 117° = 63°

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X+y=3 x-y=1 find the Find the determinants

Mkey [24]

Answer:

D = -2
Dx = -4
Dy = -2

Step-by-step explanation:

<u>System Determinant</u>

The determinant of the system is the determinant of the matrix of coefficients:

$D=\left|\begin{array}{cc}1&1\\1&-1\end{array}\right|=(1)(-1)-(1)(1)=-2$

<u>X Determinant</u>

This is the determinant of the matrix with the x-coefficients replaced by the constants.

$D_x=\left|\begin{array}{cc}3&1\\1&-1\end{array}\right|=(3)(-1)-(1)(1)=-4$

<u>Y Determinant</u>

This is the determinant of the matrix with the y-coefficients replaced by the constants.

$D_y=\left|\begin{array}{cc}1&3\\1&1\end{array}\right|=(1)(1)-(3)(1)=-2$

_____

This problem didn't ask, but the solution is ...

x = Dx/D = -4/-2 = 2

y = Dy/D = -2/-2 = 1

(x, y) = (2, 1)

3 0

3 years ago

In MODE, (second line), fix the number of decimal places to be 2. Then the slope and the y-intercept values of the LinReg line w

Mrrafil [7]

The equation of line is y = 92x – 182631. The slope is 92 and the y-intercept is the negative 182631. And the health expenditure in 2010 will be 2289.

<h3>What is the equation of a line passing through two points?</h3>

Suppose the given points are (x₁, y₁) and (x₂, y₂), then the equation of the straight line joining both two points is given by

$\rm (y - y_1) = \left [ \dfrac{y_2 - y_1}{x_2 - x_1} \right ] (x -x_1)$

In MODE, (second line), fix the number of decimal places to be 2.

Then the slope and the y-intercept values of the Lin Reg line will round to the nearest hundredth.

(x₁, y₁) → (1997, 1093)

(x₂, y₂) → (2002, 1553)

Then we have

y – 1093 = [(1553 – 1093) / (2002 – 1997)] (x – 1997)

y – 1093 = [460 / 5] (x – 1997)

y – 1093 = 92 (x – 1997)

y = 92x – 182631

If x = 2010, then the value of y will be

y = 92 × 2010 – 182631

y = 184920 – 192631

y = 2289

Learn more about straight-line equations here:

brainly.com/question/380976

#SPJ1

6 0

2 years ago

URGERNT!!!PLS AT LEAST TAKE A LOOK!!! SHARE YO SMARTNESSS!! AND BLESS YOUR GRADES!

Leto [7]

Answer:

Dear Laura Ramirez

Answer to your query is provided below

1) option A is correct

2) option B is correct

Step-by-step explanation:

Explanation for the first question attached in image

Also note - The converse of the hinge theorem states that if two triangles have two congruent sides, then the triangle with the longer third side will have a larger angle opposite that third side.