2 years ago

How do I solve this problem -2x+9y=15 x+7=4

Mathematics

1 answer:

Olegator [25]2 years ago

4 0

Answer:

x= -3 and y =1

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Solve for x and y:<br> x+y=5 x−y=a <br> PLEASE I NEED MY ANSWER TILL TOMORROW MORNING!

KengaRu [80]

Answer:

x= $\frac{a+5}{2}$ y=5- $\frac{a+5}{2}$

Step-by-step explanation:

x+y=5

y=5-x

x-y=a

x-(5-x)=a

2x-5=a

2x=a+5

x= $\frac{a+5}{2}$

x+y=5

$\frac{a+5}{2}$ +y=5

y=5- $\frac{a+5}{2}$

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3 years ago

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Scrat [10]

8 children ($4 x 8 = $32)
2 adults ($6 x 2 = $12)
2 senior citizens ($3 x 2 = $6)

32+12+6 = 50

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3 years ago

A rattlesnake is 2.44m long. How long is the snake in cm?

Dennis_Churaev [7]

Answer:

244 cm

Step-by-step explanation:

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3 years ago

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Why are these incorrect 3sqrt 7 - sqrt 7 =3

timurjin [86]

Because the left side sqrt is multiplied by 3 if it was just added it would be correct because it would cancel out and leave the 3’s. Since it’s multiplied it would change the value

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3 years ago

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Evaluate the surface integral. s xy ds s is the triangular region with vertices (1, 0, 0), (0, 8, 0), (0, 0, 8)

zmey [24]

Parameterize $S$ by

$\vec s(u,v)=(1-u)v\,\vec\imath+8uv\,\vec\jmath+8(1-v)\,\vec k$

with $0\le u\le1$ and $0\le v\le1$ .

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and the surface integral is

$\displaystyle\iint_Sxy\,\mathrm dS=8\sqrt{66}\int_0^1\int_0^18(1-u)uv^3\,\mathrm du\,\mathrm dv=\boxed{8\sqrt{\dfrac{22}3}}$

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3 years ago