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Anarel [89]
3 years ago
6

Solve for x and y simultaneous3x - 5y = 3y-2x = 5​

Mathematics
1 answer:
timurjin [86]3 years ago
7 0

Answer:

the answer is x= -4 and y= -3

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which expression is equivalent to 2m(3/2m+1) +3 (5/3m-2) ? A .3m^2+5m-1 B. 3/4m^2 +23/9m-6 C. 3m^2+7m-6 D. 3/4m^2+5/9m-1 please
horrorfan [7]

Answer:

66

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Nancy sells handcrafted bracelets at a flea market for $7. If her monthly fixed costs are $775 and each bracelet costs her $2.75
sleet_krkn [62]
Each bracelet costs $2.75 She sells them for $7 She makes 7-2.75 = $4.25/bracelet   Let b = # bracelets To make a profit she has to earn more than $775   4.25b > 775 b > 775/4.25 b > 182 6/17
  To make a profit she must sell at least 182 bracelets  
8 0
3 years ago
A wall is in the shape of a trapezium. The first level of the wall is made up of 50 bricks where as the top level has 14 bricks.
alukav5142 [94]

Answer:

i). 10 levels of the bricks

ii). 320 bricks

Step-by-step explanation:

First level contains number of bricks = 50

Second level will contain = 50 - 4 = 46 bricks

Similarly, 3rd level will contain number of bricks = 46 - 4 = 42

Therefore, sequence formed for the number of bricks in each level of the wall will be,

50, 46, 42........14

This sequence is an arithmetic sequence having,

First term 'a' = 50

Common difference 'd' = 46 - 50 = (-4)

Last term of the sequence T_{n}= 14

i). Expression representing last term will be,

  T_{n}=a+(n-1)d

  Here T_{n} = nth term

  a = first term

  n = number of term (Number of level of the wall)

  d = common difference

  By substituting these values in the formula,

  14 = 50 + (n - 1)(-4)

  14 - 50 = (-4)(n - 1)

  -36 = -4(n - 1)

  9 = (n - 1)  

  n = 9 + 1

  n = 10

ii). Number of bricks used in the wall = Sum of the sequence

   Expression for the sum of an arithmetic sequence is,

   S_n=\frac{n}{2}[2a+(n-1)d]

   S_n=\frac{10}{2}[2\times 50+(10-1)(-4)]

        = 5(100 - 36)

        = 320 bricks

4 0
2 years ago
Find x. 4 square root 3 2 square root 3 8 8 square root 3
UkoKoshka [18]

Answer:

8

Step-by-step explanation:

sin \:  \alpha  =  \frac{opp}{hyp}  \\ sin \: 30 =  \frac{4}{x}  \\  \frac{1}{2}  =  \frac{4}{x}  \\

x = 4 \times 2 \\ x = 8

6 0
3 years ago
Nicki shows a magic trick to three of her freinds. Each of those freinds shows it to three more freinds. If the pattern is repea
Inga [223]

Answer:

109

Step-by-step explanation:

Hopw it helps :).

8 0
3 years ago
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