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3 years ago

In which step did Fiona make an error? Step 1 Step 2 Step 3 Step 4

Mathematics

1 answer:

zzz [600]3 years ago

6 0

Answer:

Fiona made her error in : Step 2.

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Triangle DEF has vertices D = (-4,-4), E = (-2,-4), and F = (-3,-1). 5! 3 2 1 -7 6 5 4 3 2 2 3 4 5 6 10 5 3. What is the area of

maxonik [38]

Answer:

$Area = 3$

Step-by-step explanation:

Given

$D = (-4,-4)$

$E = (-2,-4)$

$F = (-3,-1)$

Solving (a) and (b):

See attachment for plot and labelled vertices

Solving (c): The area

This is calculated using:

$Area = \frac{1}{2}|x_1y_2 - x_2y_1 + x_2y_3 - x_3y_2+x_3y_1 - x_1y_3|$

Where:

$D = (-4,-4)$ -- $(x_1,y_1)$

$E = (-2,-4)$ -- $(x_2,y_2)$

$F = (-3,-1)$ -- $(x_3,y_3)$

This gives:

$Area = \frac{1}{2}|(-4*-4) - (-4*-2) + (-2 *-1) - (-3*-4)+(-3*-4) - (-4*-1)|$

$Area = \frac{1}{2}|16 - 8 +2- 12+12 - 4|$

$Area = \frac{1}{2}|6|$

This gives

$Area = \frac{1}{2} * 6$

$Area = 3$

7 0

3 years ago

Please help me with this question

ValentinkaMS [17]

Answer:

56 and 7 its going by 5

Step-by-step explanation:

7 0

3 years ago

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Which expression shows how 6 • 45 can be rewritten using the distributive property?

tatuchka [14]

6*45=270 is the first step you should do to get the answer you are looking for. The next thing I would do is go to all the answers to see which one comes out the same way. The first one comes to be 246, the next one is 54, the next is 270 and the last one is 220. 6*40+6*5 is the correct answer.

4 0

4 years ago

Helppppppppppppppppppppp

Alex_Xolod [135]

Answer:

$\frac{ {x}^{2} + - 4x - 2 }{ {x}^{2} - 4 } + \frac{8x + 6}{{x}^{2} - 4} \\ = \frac{ {x}^{2} + - 4x + 8x - 2 + 6 }{ {x}^{2} - 4 } \\ = \frac{ {x}^{2} + 4x + 4 }{ {x}^{2} - 4 } \\ = \frac{ {(x + 2)}^{2} }{(x - 2)(x + 2)} \\ = \frac{x + 2}{x - 2}$

5 0

3 years ago

Solve the following system using substitution or elimination. Make sure you express your answer as a coordinate point (x, y).

Nastasia [14]

Answer:

(-1,2)

Step-by-step explanation:

2(3x+5)+3x=1

6x+10+3x=1

9x+10=1

9x=-9

x=-1

y=3(-1)+5

y=-3+5

y=-2

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3 years ago

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