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s344n2d4d5 [400]
3 years ago
13

See 35 Points + Brainest

Mathematics
2 answers:
taurus [48]3 years ago
6 0
What grade

Is the work for
makkiz [27]3 years ago
6 0

Answer:

Step-by-step explanation:

let (x,y) be coordinates of P.

PM=\sqrt{(-5-x)^2+(3-y)^2} \\PN=\sqrt{(2-x)^2+(4-y)^2} \\\frac{PM}{PN} =\frac{\sqrt{(-5 -x)^2 +(3-y)^2} }{\sqrt{(2-x)^2+(4-y)^2 } } =\frac{3}{2}\\4[(-5-x)^2+(3-y)^2]=9[(2-x)^2+(4-y)^2]\\4[25+x^2+10x+9+y^2-6y]=9[4+x^2-4x+16+y^2-8y] \\4x^2+4y^2+40x-24y+100+36=9x^2+9y^2-36x-72y+36+144\\4x^2-9x^2+4y^2-9y^2+40x+36x-24y+72y+100+36-36-144=0\\-5x^2-5y^2+76x+48y-44=0\\5x^2+5y^2-76x-48y+44=0

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4x²-9y², 8x³ - 27y³ and (2x-3y)²​
Effectus [21]

Step-by-step explanation:

I am only sure about the first one but as for the rest I am not really but I tried...if you need explanations to the first one feel free to ask me

5 0
2 years ago
It took Joe 3 hours swimming at a speed of 12 miles per hour to swim along the Charles River. If Jennifer is swimming the same p
polet [3.4K]

Answer:

4 hours

Step-by-step explanation:

3 x 12 = 36

36/9 = 4

7 0
3 years ago
Helpppppp!!!!!!!! pleaseee!!!!!!!!!!
vovangra [49]

Adding all of the areas together:

5 x 6 = 30

4 x 6 = 24

3 x 6 = 18

4^2 + 3^2 = 16 + 9 = 25(square root) = 5

" " = 5

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7 0
3 years ago
There are 158 students registered for American History classes. There are twice as many students registered in second period as
Margarita [4]

There are 28 students in first period and 56 students in sceond period and 74 students in third period

<em><u>Solution:</u></em>

Let the number of students in first period be "x"

Let the number of students in second period be "y"

Let the number of students in third period be "z"

<em><u>There are 158 students registered for American History classes.</u></em>

Therefore,

x + y + z = 158 ---------- eqn 1

<em><u>There are twice as many students registered in second period as first period</u></em>

number of students in second period = twice of number of students in first period

y = 2x ------- eqn 2

<em><u>There are 10 less than three times as many students in third period as in first period</u></em>

number of students in third period = 3 times number of students in first period - 10

z = 3x - 10 ------ eqn 3

<em><u>Substitute eqn 2 and eqn 3 in eqn 1</u></em>

x + 2x + 3x - 10 = 158

6x = 168

<h3>x = 28</h3>

<em><u>Substitute x = 28 in eqn 2</u></em>

y = 2(28)

<h3>y = 56</h3>

<em><u>Substitute x = 28 in eqn 3</u></em>

z = 3(28) - 10

z = 84 - 10

<h3>z = 74</h3>

Thus there are 28 students in first period and 56 students in sceond period and 74 students in third period

5 0
3 years ago
How many inches is in 4 feet
Natali [406]

144 inches in 4 feet

3 0
3 years ago
Read 2 more answers
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