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Vadim26 [7]
3 years ago
12

Identify a possible first step using the elimination method to solve the system and then find the solution to the system. 2x − 5

y = 11 3x + 2y = 7
Mathematics
2 answers:
tatuchka [14]3 years ago
6 0

In order to use the elimination method, we have to multiply the equation by some number, so that one of the variable has the same coefficient.

For example, multiplying the first equation by 3 and the second by 2 gives the following, equivalent system:

\begin{cases}6x-15y=33\\6x+4y=14\end{cases}

Now, we can subtract the two equations, and we will cancel (eliminate) the x variable:

-19y=19 \iff y=-1

Now that y is known, plug it into one of the equations: for example, if we use the first one we get

2x+5 = 11 \iff 2x = 6 \iff x=3

ddd [48]3 years ago
5 0

Answer:

Multiply first equation by −3 and second equation by 2, solution (3, −1).

Step-by-step explanation:

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Answer:

1. Start with $1 and then double the money you have everyday for 30 days. You would end up with 1,073,741,824 on the 30th day.

Step-by-step explanation:

Why you should choose the first option:

1 x 2 = 2

2 x 2 = 4

4 x 2 = 8

8 x 2 = 16

16 x 2 = 32

32 x 2 = 64

64 x 2 = 128

128 x 2 = 256

256 x 2 = 512

512 x 2 = 1024

1024 x 2 = 2048

2048 x 2 = 4096

4096 x 2 = 8192

8192 x 2 = 16384

16384 x 2 = 32768

32768 x 2 = 65536

65536 x 2 = 131072

131072 x 2 = 262144

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1048576 x 2 = 2097152

2097152 x 2 = 4194304

4194304 x 2 = 8388608

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7 0
2 years ago
Which equation represents the amount of money that Mr. Cooney earns in x hours? math
padilas [110]

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3 years ago
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Answer:

x=-4 and y=4

Step-by-step explanation:

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<span>We cannot deduce about the exact location of P between J and K. But we can conclude: segment JP + segment PK = line JK.
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