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solniwko [45]
2 years ago
8

Easy points for those who are good at math!

Mathematics
1 answer:
zalisa [80]2 years ago
4 0

<u>Answer:</u>

The answer is A) y = -7x - 7.

<u>Step-by-step explanation:</u>

First, you need to subtract '7x' from both sides, and once that is done, the equation is in slope-intercept form because it is in y=mx+b form. I'll attach a photo below that explains my process! :) And another possible answer would be y = 7x + 7, but that is not an option listed above.

<em>Hope this helps! Feel free to give me Brainliest if you feel this helped. Have a good day, and good luck on your assignment. :)</em>

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What is the length of side BC of the triangle? Make sure to show all of your work!
Mrrafil [7]
Isosceles triangle
so
x + 8 = 2x -1
x = 9

BC = 3x - 3
BC = 3(9) - 3
BC = 27 - 3
BC = 24
5 0
3 years ago
Which number line shows a graph of the ineqiality x &gt; -23?
Sidana [21]

Answer:

a line from -23 to the positive numbers

Step-by-step explanation:

3 0
2 years ago
How many times 9 go into 20
Genrish500 [490]
20:9=\dfrac{20}{9}=\dfrac{18+2}{9}=\dfrac{18}{9}+\dfrac{2}{9}=2\dfrac{2}{9}

Answer: 2 times.
8 0
2 years ago
Find a recursive formula for the sequence:<br><br> 1, -1, -7, -25
Mumz [18]
<h3>Answer:</h3>

a_n=3a_{n-1}-4

<h3>Step-by-step explanation:</h3>

<em>Try the answers</em>

You can try the answers to see what works. You can expect all of the choices to match the first two terms, so try some farther down. Let's see if we can get -25 from -7.

a) 3*(-7) -4 = -21 -4 = -25 . . . . this one works

b) -7 -2 = -9 . . . . ≠ -25

c) -3(-7) +2 = 21 +2 = 23 . . . . ≠ -25

d) -2(-7) +1 = 14 +1 = 15 . . . . ≠ -25

The formula that works is the first one.

_____

<em>Derive it</em>

All these formulas depend on the previous term only, so we can write equations that show the required relationships. Let the unknown coefficients in our recursion formula be p and q, as in ...

a_n=p\cdot a_{n-1}+q

Then, to get the second term from the first, we have

... 1·p +q = -1

And to get the third term from the second, we have

... -1·p +q = -7

Subtracting the second equation from the first gives ...

... 2p = 6

... p = 3 . . . . . . . this is sufficient to identify the first answer as correct

We can find q from the first equation.

... q = -1 -p = -1 -3 = -4

So, our recursion relation is ...

a_n=3a_{n-1}-4

6 0
3 years ago
Which line is parallel to the line that passes through the points (1, 7) and (-3, 4)? A. B. C. D.
Helga [31]

Answer:

hope this helps you

7 0
3 years ago
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