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Bond [772]
3 years ago
13

The coordinates of the vertices of quadrilateral ABCD are A(-5, 1), B(-2,5), C(5, 3),

Mathematics
2 answers:
sladkih [1.3K]3 years ago
6 0

Step-by-step explanation:

To calculate a slope, we need to apply: m=\frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }

Applying formula to each slope:

m_{AB}=\frac{5-1}{-2-(-5)} = \frac{4}{3}  \\m_{BC}=\frac{3-5}{5-(-2)} =\frac{-2}{7}\\m_{CD}=\frac{-1-3}{2-5}=\frac{-4}{-3} =\frac{4}{3}

So, as you can see, there are equal pair of slopes, meaning that they are parallels, which<em> demonstrate that it's actually a quadrilateral figure.</em>

GenaCL600 [577]3 years ago
5 0

Answer: slope (AB)= 4/3 slope(BC)=-2/7 slope(CD) =4/3 slope(AD) = -2/7

Step-by-step explanation:

To find the slope, lets take a pair ones after the other

A(-5, 1) B(-2,5)

Given; x₁ =-5 y₁ = 1 x₂=-2 y₂=5

slope(AB) = y₂ - y₁ / x₂ - x₁

=5 - 1 / -2--5

=4/3

slope BC

B(-2, 5) c(5,3)

Given;

x₁=-2 y₁=5 x₂=5 y₂=3

slope(BC) = y₂ - y₁ / x₂ - x₁

= 3-5 / 5--2

=-2/7

slope CD

C(5, 3) D(2, -1)

Given;

x₁ = 5 y₁ = 3 x₂ = 2 y₂= -1

slope(CD)= y₂ - y₁ / x₂ - x₁

= -1-3 / 2-5

= -4/-3

= 4/3

slope AD

A(-5, 1) D(2, -1)

Given;

x₁ = -5 y₁ =1 x₂ =2 y₂ =-1

slope(AD) = y₂ - y₁ / x₂ - x₁

= -1-1 / 2--5

= -2/7

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9 burgers and 1 doughnut cost $31.30. 3 doughnuts and 6 burgers cost $26.70. Find the cost of 2 burgers.​
kirill [66]

Step-by-step explanation:

Let assume that

Cost of 1 burger = $ x

Cost of 1 doughnuts = $ y

According to statement, 9 burgers and 1 doughnut cost $ 31.30

\begin{gathered}\sf \: 9x + y = 31.3 \\ \\ \end{gathered}

\begin{gathered}\sf\implies \sf \: y = 31.3 - 9x - - - (1) \\ \\ \end{gathered}

According to statement again, 3 doughnuts and 6 burgers cost $ 26.70

\begin{gathered}\sf \: 6x + 3y = 26.7 \\ \\ \end{gathered}

\begin{gathered}\sf \: 3(2x + y) = 26.7 \\ \\ \end{gathered}

\begin{gathered}\sf \: 2x + y = 8.9 \\ \\ \end{gathered}

On substituting the value of y from equation (1), we get

\begin{gathered}\sf \: 2x + 31.3 - 9x = 8.9 \\ \\ \end{gathered}

\begin{gathered}\sf \: 31.3 - 7x = 8.9 \\ \\ \end{gathered}

\begin{gathered}\sf \: - 7x = 8.9 - 31.3 \\ \\ \end{gathered}

\begin{gathered}\sf \: - 7x = - 22.4 \\ \\ \end{gathered}

\begin{gathered}\bf\implies \: x = 3.2 \\ \\ \end{gathered}

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1 year ago
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Describe the correlation in the scatterplot below
Inessa05 [86]

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'no' and 'show no pattern'

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with scatter plots like these, there is no exact information at all, what so ever

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ch4aika [34]

Answer:

=16 ft 6 in

Step-by-step explanation:

Remainder side = Total lot - house -other side

=(56 ft 9 in) - (34 ft 10 in) - (5 ft 5 in)

=(55 ft 21 in) - (34 ft 10 in) - (5 ft 5 in)

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8 0
3 years ago
write 5 to the 8 power as a quotient of two exponential terms with the same base in four different ways. use negative and/or zer
shusha [124]

Answer:

jhfjdhsuhufhre

Step-by-step explanation:

a) 3x+2(41-5x)=33            as y=41-5x is given

3x+82-10x=33

-7x+82=33

-7x=33-82

-7x=-49        cut the negative signs as its LHS and RHS

x=49/7=7

b)-5x+3(3x-3)=3   as y=3x-3 is given

-5x+9x-9=3

4x-9=3

4x=3+9

x=12/4=3

c)4x+11-5x=9

-x+11=9

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-x=-2         cut the negative signs as its LHS and RHS

x=2

d) 5y+ -5-2y=-11      as x=-5-2y is given

3y+-5=-11

3y=-11+5

3y=-6

y=-6/3=-2

e)-5x-4(2x+1)=35       as y=2x+1

-5x-8x+4=35

3x+4=35

3x=35-4

3x=31

x=31/3

x=10.3

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3 years ago
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