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scoray [572]
3 years ago
13

Jose is purchasing 4 dress shirts that cost $28 each and 2 pairs of pants that costs

Mathematics
1 answer:
marta [7]3 years ago
5 0
28 / 4 will get the unit rate for dress shirts but you have to tell the costs of the pairs of pants
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Solve the equation 7x-2(x-10)=40
bekas [8.4K]

Answer:

7

−

2

(

−

1

0

)

=

4

0

7x{\color{#c92786}{-2(x-10)}}=40

7x−2(x−10)=40

7

−

2

+

2

0

=

4

0

Step-by-step explanation: therefore your answer would be x=4  

BRAINLIEST PLEASE

5 0
2 years ago
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Use the method of undetermined coefficients to find the general solution to the de y′′−3y′ 2y=ex e2x e−x
djverab [1.8K]

I'll assume the ODE is

y'' - 3y' + 2y = e^x + e^{2x} + e^{-x}

Solve the homogeneous ODE,

y'' - 3y' + 2y = 0

The characteristic equation

r^2 - 3r + 2 = (r - 1) (r - 2) = 0

has roots at r=1 and r=2. Then the characteristic solution is

y = C_1 e^x + C_2 e^{2x}

For nonhomogeneous ODE (1),

y'' - 3y' + 2y = e^x

consider the ansatz particular solution

y = axe^x \implies y' = a(x+1) e^x \implies y'' = a(x+2) e^x

Substituting this into (1) gives

a(x+2) e^x - 3 a (x+1) e^x + 2ax e^x = e^x \implies a = -1

For the nonhomogeneous ODE (2),

y'' - 3y' + 2y = e^{2x}

take the ansatz

y = bxe^{2x} \implies y' = b(2x+1) e^{2x} \implies y'' = b(4x+4) e^{2x}

Substitute (2) into the ODE to get

b(4x+4) e^{2x} - 3b(2x+1)e^{2x} + 2bxe^{2x} = e^{2x} \implies b=1

Lastly, for the nonhomogeneous ODE (3)

y'' - 3y' + 2y = e^{-x}

take the ansatz

y = ce^{-x} \implies y' = -ce^{-x} \implies y'' = ce^{-x}

and solve for c.

ce^{-x} + 3ce^{-x} + 2ce^{-x} = e^{-x} \implies c = \dfrac16

Then the general solution to the ODE is

\boxed{y = C_1 e^x + C_2 e^{2x} - xe^x + xe^{2x} + \dfrac16 e^{-x}}

6 0
1 year ago
What is not a common factor for the two fractional terms 
lianna [129]
 This just means that thefraction<span> has been reduced. For instance 4 / 6 is </span>not<span> such a </span>fraction<span>, because the top and the bottom have </span>gcf<span> = </span>2<span>, but </span>2<span> / 3 is such a </span><span>fraction</span>
8 0
2 years ago
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Solve for x<br> 4r – 9 – 6x = 21
ehidna [41]

Answer:

X= 30-4r/-6

Step-by-step explanation:

1. Move the 9 to the other side. (21+9=30)

2. subtract the 4r and move it to the other side (-6x=21-4r)

3. divide both sides by -6

5 0
3 years ago
What is the square root of 2​
Aliun [14]

Answer: is 1.41421 hope this helps :)

6 0
3 years ago
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