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3 years ago

Which three lengths could be the length of the sides of a triangle?

Mathematics

1 answer:

Firdavs [7]3 years ago

7 0

Answer is
<span>1: 6cm, 10cm, 9cm

6 + 10 > 9
6 + 9 >10
10 + 9 > 6

</span>

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A rectangular field with perimeter of 80m is to have an area of at least 380m² . Describe the possible lengths and of the field.

Kryger [21]

$let \: x \: be \: the \: length \\ let \: y \: be \: the \: width$

$perimeter = 2x + 2y \\ area = xy$

$2x + 2y = 80 \\ xy = 380 \\ \\ x + y = 40 \\ xy = 380 \\ \\ x = 40 - y \\ (40 - y)y = 380$

$40y - y {}^{2} = 380 \\ y {}^{2} - 40y + 380 = 0 \\ y {}^{2} - 40y + 400 = 20 \\ (y - 20) {}^{2} = 20 \\ y - 20 =± \sqrt{20} \\ y_{1}=20-√20≈15.52786\\ y_{2}=20+√20≈24.4721$

6 0

2 years ago

Annie works as both a carpenter and a blacksmith. Last week she worked 12 hours as a carpenter and 20 hours as a blacksmith and

Minchanka [31]

Answer:Let x = pay per hour as a carpenter and y = pay per hour as a blacksmith

Last week she worked 12 hours as a carpenter

earning 12x dollars

and 20 hours as a blacksmith

earning 20y dollars

and earned a total of $860

and those two things add up to 860.

Do the same with the other sentence, giving you a second equation.

Step-by-step explanation:

6 0

4 years ago

Write an equivalent ratio for 7:8 with 40 as one of the terms.

kvv77 [185]

Answer:

Step-by-step explanation:

Five equivalent ratios:

7:8 = 14:16

= 21:24

= 70:80

= 49:56

= 35:40

8 0

3 years ago

17. If the numerator is larger than the denominator, then the value of the fraction is

kipiarov [429]

Answer:

Step-by-step explanation:

The numerator being bigger would make it an improper fraction, making it larger than one.

6 0

3 years ago

You are trying to sell a new product to a store owner. Which method of presentation is likely the most effective?

frutty [35]

Answer:

Opps I acidentally put it in the comments

The answer is D

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers