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liq [111]
3 years ago
9

What does it mean? I need help with this

Mathematics
1 answer:
marissa [1.9K]3 years ago
7 0
The median is where you add all the numbers up and divide them by how many total numbers there were
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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
Read 2 more answers
Express x% of 4 plus y% of 5 as a percentage of 11
djverab [1.8K]
X% of 4 = x*4/100 = 0.04x

y% of 5 = x*5/100 = 0.05y

x% of 4 + y% of 5 = 0.04x + 0.05y

How you express a number, n, as percentage of 11?: [n/11]*100= 9.10n %

Then make n = 0.04x + 0.05y

9.10n %= 9.10[0.04x + 0.05y] %= (0.3656x + 0.455y)%

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4 0
3 years ago
Which of the following are continuous?
goldenfox [79]
E and D are continuous
7 0
3 years ago
Teresa buys a $2700 refrigerator using an installment plan that requires 20% down. How much is the down payment? A. $27 B. $270
jeka57 [31]

Answer:

C $540

Step-by-step explanation:

2700 / 10 = 270 = 10%

270 x 2 = 540 = 20%

7 0
2 years ago
Read 2 more answers
What is the solution of the equation? <br> 4(y+2)=32<br> A 4<br> B 6<br> C -10<br> D 10
Rus_ich [418]
B h lnv go lobcdxxjkllkfvnnnjgfcxx cabvbm
4 0
2 years ago
Read 2 more answers
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