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lesantik [10]
2 years ago
8

4\\ 2x + 4y = 18" alt="x + y = 14\\ 2x + 4y = 18" align="absmiddle" class="latex-formula">
​
Mathematics
1 answer:
alexgriva [62]2 years ago
5 0

Answer:

x = 19, y = -5

Step-by-step explanation:

x + y = 14  => x= 14-y

2x + 4y = 18  => 2(x+2y)=18  => x+2y=9

x+2y=9 => (14 - y) + 2y = 9

14 + y = 9  => y = -5

x + (-5) = 14  => x=19

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Urgent help needed fast
Katena32 [7]

Answer:

Below

Step-by-step explanation:

You can use this formula to find the sum of an arithmetic series

     Sn = n / 2 (a1 + an)

You need to find the number of terms in each series before using the formula

     Tn = a + (n - 1) d

a) 53 = 5 + (n - 1) 3

      n = 17

Sn = 17 / 2 (5 + 53)

    = 493

b) 98 = 7 + (n - 1) 7

      n = 14

Sn = 14 / 2 (7 + 98)

   = 735

       

c) -102 = 8 + (n - 1) -5

        n = 23

Sn = 23 / 2 (8 + (-102))

   = - 1081

d) 41/3 = 2/3 + (n - 1) 1

        n = 14

Sn = 14 / 2 (2/3 + 41/3)

    = 301 / 3 or 100 1/3  

Hope this helped! Best of luck <3

7 0
2 years ago
Sales Tax - You go to the store and purchase a shirt for $33.99, how much will you pay
Savatey [412]

Answer:

$95.17

Step-by-step explanation:

33.99 \times 0.0825

= 2.80

33.99 + 2.80

= $95.17

7 0
2 years ago
A lab technician is mixing a solution and needs to convert 5 gallons to liters.
jarptica [38.1K]
The answer to the problem is approximately 19 liters
5 0
3 years ago
What is the length of n ? <br> 16<br> 8<br> 2<br> 4
Dima020 [189]

Answer:

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Step-by-step explanation:

3 0
3 years ago
5x+4y=-14 <br>3x+6y=6<br> solve the system below by the elimation​
lana66690 [7]

Answer:

y = 4

x = -6

Step-by-step explanation:

multiply first equation by 3

3×(5x+4y)= -14 ➡ 15x + 12y = -42

multiply second equation by -5

-5×(3x+6y)= 6➡ -15x -30y = -30

now add both equations up

15x +12y -15x -30y = -42 -30 (15x will eliminate -15x)

-18y = -72

y = 4 use this to find value of x

3x + 6×4 = 6 ➡ ex = -18 ➡ x = -6

8 0
3 years ago
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