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antiseptic1488 [7]
3 years ago
7

Given trapezoid PQRS, which of the following must be true?

Mathematics
1 answer:
Helga [31]3 years ago
4 0
The trapezoid the legs are congruent to each other
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What is the area of square HIJK
vagabundo [1.1K]
The perimeter is 36 and the area is 81 units
hope this helps:)
3 0
3 years ago
Read 2 more answers
Anita plans to give her husband 3 shirts for his birthday. She narrows the search to 3 shirts from a selection of 17 shirts at D
Lunna [17]

Using the combination formula, it is found that she can select the shirts in 775,200 ways.

The order in which the shirt are chosen is not important, hence, the <em>combination formula</em> is used to solve this question.

Combination formula:

C_{n,x} is the number of different combinations of x objects from a set of n elements, given by:

C_{n,x} = \frac{n!}{x!(n-x)!}

In this problem:

  • 3 shirts from a set of 17.
  • Then, 3 shirts from a set of 20.
  • They are independent, hence, to find the total, we multiply both combinations.

T = C_{17,3} \times C_{20,3} = \frac{17!}{3!14!} \times \frac{20!}{3!17!} = 680 \times 1140 = 775200

She can select the shirts in 775,200 ways.

To learn more about the combination formula, you can check brainly.com/question/25821700

5 0
3 years ago
1 and 2 is all I need and you guys would help me from not getting beat
Sonja [21]

Answer:

1. -10

2. -11

Step-by-step explanation:

6 0
3 years ago
I need help with this please
Marina86 [1]

Answer:

348cm^2

Step-by-step explanation:

3 0
3 years ago
Solve for n 19 + 10n = 7n - 20
kakasveta [241]

Answer:

n = -13

Step-by-step explanation:

19 + 10n = 7n - 20

Subtract 7n from each side

19 + 10n-7n = 7n-7n - 20

19+3n = -20

Subtract 19 from each side

19+3n -19 = -20-19

3n = -39

Divide each side by 3

3n/3 = -39/3

n = -13

7 0
3 years ago
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