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kupik [55]
2 years ago
9

Fernando had 20 minutes to do a three-problem quiz. He spent 10 9/10 minutes on question A and 5 3/5 minutes on question B. How

much time did he have left for question C?
Mathematics
1 answer:
katrin2010 [14]2 years ago
4 0

Answer:

1.65 minutes

Step-by-step explanation:

10 9/10 + 5 3/5 = 16 1/2

16 1/2 divided by 20 = 1.65 or 33/20

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The vertices of a triangle are (-1,3) (6,3) and (-1,-4)
Travka [436]

Answer:

24.5 unit²

Step-by-step explanation:

Area of ∆

= ½ | x₁(y₂ - y₃) + x₂(y₃ - y₁) + x₃(y₁ - y₂) |

= ½ | (-1)(3 -(-4)) + 6(-4 -3) + (-1)(3 - 3) |

= ½ | -7 - 42 |

= ½ | - 49 |

= ½ (49)

= 24.5 unit²

<u>Method 2:</u>

Let the vertices are A, B and C. Using distance formula:

AB = √(-1-6)² + (3-3)² = 7

BC = √(-6-1)² + (-4-3)² = 7√2

AC = √(-1-(-1))² + (4-(-3))² = 7

Semi-perimeter = (7+7+7√2)/2

= (14+7√2)/2

Using herons formula:

Area = √s(s - a)(s - b)(s - c)

here,

s = semi-perimeter = (14 + 7√2)/2

s - a = S - AB = (14+7√2)/2 - 7 = (7 + √2)/2

s - b = (14+7√2)/2 - 7√2 = (14 - 7√2)/2

s - c = (14+7√2)/2 - 7 = (7 + √2)/2

Hence, on solving for area using herons formula, area = 49/2 = 24.5 unit²

3 0
2 years ago
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Which is the mode of the data given below 24686424664​
Gnom [1K]
The mode is: 6 and 4
7 0
2 years ago
What is the slope of this question
Otrada [13]
The slope would be 2
6 0
3 years ago
HELP ME ASAP! Will give BRAINLIEST! Please read the question THEN answer correctly! No guessing. Check ALL that apply.
Scilla [17]

Answer:

c and e

Step-by-step explanation:meow

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3 years ago
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Help me with this one last one please
V125BC [204]
It is the 3rd option

7 0
3 years ago
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