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anzhelika [568]
3 years ago
14

Can someone help me please

Mathematics
1 answer:
malfutka [58]3 years ago
5 0

Answer:

-2.5

Step-by-step explanation:

We need to find the slope using and two points

m = ( y2 -y2)/(x2-x1)

    = ( 25-20)/(-10 - -8)

    = 5/( -10+8)

   = 5/-2

  - 2.5

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a rectangle has a perimeter of 88cm. if the height is three times the length of the width what are the dimensions of the rectang
fredd [130]

Answer:

P=88. L=3w

P= 2(w)+2(L)

Then substitute the values into the equation

88=2w+2(3w)

Then solve for w and its length which is 3w

5 0
3 years ago
12 divided by 479, make sure to show your work.<br><br><br> x+7=2x Please Solve
Dmitriy789 [7]
  • 12/479
  • 0.025

#2

  • x+7=2x

Take x right

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2 years ago
Find the surface area of the figure below. Round it to the nearest tenth.​
s2008m [1.1K]

Answer:

173.4

Step-by-step explanation:

Surface area of the cone=pi*r*l+pi*r^2=pi*(4)*(9.8+4)=173.4

8 0
2 years ago
b. If the tank is then filled to capacity, how many half-gallon bottles can be filled with the water in the tank
d1i1m1o1n [39]

Step-by-step explanation:

if the tank is filled with a cap on field to capacity how many half gallons of bottles are filled it will be about well first you have to think how much is half a gallon and it's a half of a gallon is 2 quarts how big is the tank that's what you want to know if you want to fill it up cuz I haven't gotten this 2 quarts tell me how big is the tank

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3 years ago
Use integration by parts to derive the following formula from the table of integrals.
emmasim [6.3K]

Answer:

I= (x^n)*(e^ax) /a - n/a ∫ (e^ax) *x^(n-1) dx +C (for a≠0)

Step-by-step explanation:

for

I= ∫x^n . e^ax dx

then using integration by parts we can define u and dv such that

I= ∫(x^n) . (e^ax dx) = ∫u . dv

where

u= x^n → du = n*x^(n-1) dx

dv= e^ax  dx→ v = ∫e^ax dx = (e^ax) /a ( for a≠0 .when a=0 , v=∫1 dx= x)

then we know that

I= ∫u . dv = u*v - ∫v . du + C

( since d(u*v) = u*dv + v*du → u*dv = d(u*v) - v*du → ∫u*dv = ∫(d(u*v) - v*du) =

(u*v) - ∫v*du + C )

therefore

I= ∫u . dv = u*v - ∫v . du + C = (x^n)*(e^ax) /a - ∫ (e^ax) /a * n*x^(n-1) dx +C = = (x^n)*(e^ax) /a - n/a ∫ (e^ax) *x^(n-1) dx +C

I= (x^n)*(e^ax) /a - n/a ∫ (e^ax) *x^(n-1) dx +C (for a≠0)

5 0
2 years ago
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