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Darya [45]
2 years ago
5

Write an equation in point slope form through the point (3,-1) with a slope of 2

Mathematics
1 answer:
klio [65]2 years ago
8 0

Answer:

y+1 = 2 (x -3)

Step-by-step explanation:

Point slope form is

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

The points you have are (3, -1). The 3 is x_{1} and the -1 is y_{1}

The slope, m, is 2.

Plugin the numbers for the variables.

y - -1 = 2 (x -3)\\y + 1 = 2 (x - 3)

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The temperature of the pool water started at 82 degrees, and it is cooling down 0.4 degrees each hour. If the water temperature
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Answer:

We have the same homework!!!!

hours that passed= 10

Step-by-step explanation:

(1st step)We start with the expression:

(1st)82-0.4x=78

"STARTED at 82 degrees" 82

"Cooling DOWN 0.4 degrees" -0.4

"EACH hour" x

"NOW 78 degrees" =78

(2nd step) We want to get the variable x alone, so we have to do the opposite sign they have, to cancel the number out for it to be 0.

(1st) 82 -0.4x =78

(2nd) -82 ÷-0.4 =78

(3rd)Now, you work out the problem (transfer the numbers from the left to the right). First, you have to do the subtraction sign, not sure why.

(1st) 82 -0.4x =78

(2nd) -82 ÷-0.4 =78

(3rd) 78 -82= -4

-4÷-0.4= 10

X= 10

there you have it!

To make sure this is correct, you do the following.

82 -0.4 x 10

Solve using PEMDAS

-0.4 x 10 = -4

its time to add 82.

82 - 4 = 78

78 is the exact temperature that was said in the problem

3 0
2 years ago
Two numbers, x and y, when added together equal 9 and equal -5 when subtracted.
Sedaia [141]

Answer:

x=2 and y=7

Step-by-step explanation:

Let x and be the unknown numbers.

By the condition given in the question the first equation is

x+y=9

And the second equation is

x-y=-5

By solving the first and second equations,we get the answer as

x=2 and y=7

6 0
3 years ago
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IgorLugansk [536]

Answer:

No

Step-by-step explanation:

it would 12:60

6x2=12

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andrey2020 [161]

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