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lord [1]
2 years ago
5

Help me as quick as possible 11x+4y=12 9x-4y=8 Solve it with elimination method

Mathematics
1 answer:
Firdavs [7]2 years ago
3 0

Answer:

x = 1, y = 1/4

Step-by-step explanation:

11x + 4 y = 12   \ \ \ ---( 1)\\9x -4y = 8 \ \ \  - - - (2)\\\\(1) + ( 2 ) => 20x + 0 = 20\\\\

            => x = 1

Substitute x = 1 in ( 1 ) :  

                            11 + 4y = 12\\4y = 12 - 11\\\\y =\frac{1}{4}

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A tabletop in the shape of a trapezoid has an area of 6,550 square centimeters. It's longer base measures 115 centimeters, and s
mrs_skeptik [129]
0.5h(115 + 85) = 6550
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5 0
3 years ago
HELP NOW!!!!
VMariaS [17]

Using the concept of probability and the arrangements formula, there is a  

0.002 = 0.2% probability that the first 8 people in line are teachers.

----------------------------------

  • A probability is the <u>number of desired outcomes divided by the number of total outcomes.</u>
  • The order in which they are positioned is important, and all people will be positioned, and thus, the arrangements formula is used to find the number of outcomes.

The number of possible arrangements from a set of n elements is given by:

A_n = n!

----------------------------------

The desired outcomes are:

  • First 8 people are teachers, in <u>8! possible ways.</u>
  • Last 4 are students, in <u>4! possible ways.</u>

Thus, D = 8! \times 4!

----------------------------------

For the total outcomes, <u>number of arrangements of 12 people</u>, thus:

T = 12!

The probability is:

p = \frac{D}{T} = \frac{8! \times 4!}{12!} = 0.002

0.002 = 0.2% probability that the first 8 people in line are teachers.

A similar problem is given at brainly.com/question/24650047

7 0
3 years ago
One problem with the widespread use of email is that you receive too much of it.
Kobotan [32]
The answer for your question is True because it says that "Widespread" by that you already know widespread means that it goes every where and you would get it more then one so for that your answer is true:)

Hope this helps:)
6 0
3 years ago
All of the following are equivalent except<br> 7x2<br> 4x+3x<br> (4+3)x<br> 7x
swat32

Answer:

7x2

Step-by-step explanation:

7x2 is 14 and all the other ones equal 7

6 0
3 years ago
Read 2 more answers
100%
Alborosie
6.75%
1 penny = 50% chance of tail
50% x 50% x 50% x 50%= 6.75%
8 0
3 years ago
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