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3 years ago

Can somebody help me with this. 35 points! :)))))

Mathematics

1 answer:

Vanyuwa [196]3 years ago

6 0

HAIIII!!!! Your best option is C which shows 40 degrees!! I wish you best of luck

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What should be the first step in adding these equations to eliminate y?

dybincka [34]

D. Multiply the top equation by 2

That way, 3y(2) - 6y = 6y - 6y = 0

hope this helps

8 0

3 years ago

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1. 3x + y = 11 5x - y = 21

sergeinik [125]

Answer:

[4, -1]

Step-by-step explanation:

Using the Elimination Method:

3x + y = 11

5x - y = 21

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8x = 32

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8 8

x = 4 [Plug this back into both equations to get the y-coordinate of -1]; -1 = y

The y's are already additive inverses [result in 0], canceling each other out.

I am joyous to assist you anytime.

4 0

3 years ago

Which of the following graphs represents a proportional relationship?

Lina20 [59]

The graph of a proportional relationship is a straightline that passes through the origin (0,0).

The only graph with that feature is the option c., so that is the answer.

The other graphs ar linear relationships because the are straighlines that to not pass through the origin.

Answer: the option c.

8 0

3 years ago

Given the Arithmetic series A1+A2+A3+A4

natali 33 [55]

Answer:

$S _{19} = 760$

Step-by-step explanation:

$a1 = 13 \\ a2 = 16 \\ d = a2 - a1 = 16 - 13 = 3 \\ d = 3 \\ a _{n} = l = 67 \\$

now,

$a _{n} = a + (n - 1) \times d \\ 67 = 13 + (n - 1) \times 3 \\ 67 = 13 + 3n - 3 \\ 67 - 13 + 3 = 3n \\ 57 = 3n \\ 3n = 57 \\ \\ n = \frac{57}{3} \\ \\ n = 19$

now the sum of the numbers

$S _{n} = \frac{n}{2} (a + l) \\ \\ S _{19} = \frac{19}{2} (13 + 67) \\ \\ S _{19} = \frac{19}{2} (80) \\ \\ S _{19} = \frac{19}{2} \times 80 \\ \\ S _{19} = 19 \times 40 \\ S _{19} = 760$

8 0

3 years ago

I need help bro pleaseeee

sashaice [31]

As a fraction: 20/7
As a mixed number: 2 6/7

5 0

3 years ago

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