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Masteriza [31]
3 years ago
14

PLS HELP I WILL GOVE BRAINLIEST

Mathematics
1 answer:
Gnom [1K]3 years ago
3 0

Answer:

these problems are always tough b/c they want you to translate normal thinking into math jargon  :D   soooo....

Step-by-step explanation:

they use the point slope formula... which looks like

y = y_{1} = m(x - x_{1})

where (x_{1} , y_{1} )  are the x , y coordinates of some point you're given.. sooo

they give us two points.. so we can put either one of those into the formula.. but we also have to find m.... or the slope ... to find m.. use the slope equation of

m = ( y_{2} - y_{1} ) / ( x_{2} - x_{1} )  

call either point  P1  and P2 ... i'll pick the top point as P1  and bottom as P2

then

m = ( -3 -1 ) / ( 1 - 3 )

m = -4 / -2

m = 2     ( yay  :) )

now use either point and plug it into the point slope formula, i'll use P1

y - 1 = 2(x-3)   ( this is the answer they are looking for )

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What is the solution of the matrix equation?
katrin [286]

Hello from MrBillDoesMath!

Answer:

The first choice ( -12, 20)



Discussion:

Using matrix multiplication we find the equations:


1x  + 1y = 8                     (A)

2x  + 3y = 36                   (B)


Next, compute

  2(A) - B  =>

         (2x + 2y) - (2x + 3y) = 2*8 - 36    =>

          (2x - 2x) + ( 2y-3y) = 16 - 36 =>

          -y = -20  =>

         y = 20


Substituting this y value in (A) gives

         x + 20 = 8 =>

         x = 8 - 20 =>

        x = -12


The answer is the first choice ( -12, 20)


Thank you,

MrB

6 0
3 years ago
Which type of rock results from melting and cooling of magma?
Levart [38]

Answer:

Igneous Rocks

Step-by-step explanation:

Alsooo this is Mathematics not science

6 0
3 years ago
Given the pdf of f(x) =2x for 0<x<2 and zero elsewhere, find the cdf​
Reptile [31]
Hope it helps.........

5 0
3 years ago
Answer ASAP for BRAINLIEST (NO LINKS OR I REPORT)
Westkost [7]

Answer:

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Step-by-step explanation:

V = 1/3πr²h

15π = 1/3πr²·5

you can divide each side by 5π to get:

3 = r²/3

r² = 9

r = \sqrt{9} which is 3

8 0
3 years ago
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A music store sells an average of 7 microphones each day. If they have 154 microphones, how long should it take the store to sel
kipiarov [429]

Answer:

22 days

Step-by-step explanation:

154/7=22

3 0
3 years ago
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