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4 years ago

Help please

Mathematics

2 answers:

Aliun [14]4 years ago

8 0

The first one is km and the second is the second one is km

jolli1 [7]4 years ago

5 0

Answer:

JL is 1) KM is 2)

Step-by-step explanation:

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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:

System Determinant

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

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

X Determinant

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

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

Y Determinant

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

A -5/4 B -8/10 C 3/4 D -5/3

Ede4ka [16]

Well let's remember csc = hypotenuse/opposite

Let's use the distance formula to find the length of the hypotenuse.
√(0−−8)^2+(−6−0)^2
√(0+8)^2+(−6+0)^2
√(8)^2+(−6)^2
√64+36
√100
H = 10

so csc = 10/opposite

Now to find the opposite length using distance formula
√(0−−8)^2+(0−0)^2
√(0+8)^2+(0+0)^2
√(8)^2+(0)^2
√64+0
√64
O = 8

So csc = 10/8 or 1.25

3 0

3 years ago

HELP!!!! What is-15=(3x-10)-5x

omeli [17]

Answer:

Step-by-step explanation:

$-15=(3x-10)-5x\\\\-15=3x-10-5x\qquad\text{combine like terms}\\\\-15=(3x-5x)-10\\\\-15=-2x-10\qquad\text{add 10 to both sides}\\\\-15+10=-2x-10+10\\\\-5=-2x\qquad\text{divide both sides by (-2)}\\\\\dfrac{-5}{-5}=\dfrac{-2x}{-2}\\\\2.5=x\to x=2.5$

3 0

3 years ago

Read 2 more answers

a hiking path is represented by the equation y=3/8x on a coordinate map. The county would like to create a parallel path for bik

stepladder [879]

Answer:

The equation of the bike path on a coordinate map is represented by $y = \frac{3}{8}\cdot x +1$ .

Step-by-step explanation:

From Analytical Geometry, we know that resultant parallel line is a translated version of parent line. Two lines are parallel to each other when they share the same slope. The resultant line can be construted from slope-point form:

$y-y_{o} = m_{\parallel}\cdot (x-x_{o})$

Where:

$x_{o}$ , $y_{o}$ - Components of known point, dimensionless.

$m_{\parallel}$ - Slope of the parallel line, dimensionless.

In addition, a line has also this form:

$y = m\cdot x + b$

Where:

$x$ - Independent variable, dimensionless.

$y$ - Dependent variable, dimensionless.

$m$ - Slope, dimensionless.

$b$ - y-Intercept, dimensionless.

Given that parent function is $y = \frac{3}{8}\cdot x$ , the slope of the resulting line is $m_{\parallel} = \frac{3}{8}$ . Now, if $x_{o} = 16$ and $y_{o} = 7$ , we obtain the equation of the line: