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zzz [600]
3 years ago
9

4r + 7 + 8 = -1 Can you rewrite the equation

Mathematics
1 answer:
FinnZ [79.3K]3 years ago
7 0

Answer:

4r + 15 = -1

Step-by-step explanation:

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Given the function f(x) = 9x2 + 27x + 2, find f(2).​
Marina CMI [18]

Step-by-step explanation:

In the picture, That's a correct answer.

6 0
3 years ago
If α , β are roots of x2 + 5x + a =0 and 2α + 5β = -1 then α is equal to _____?
ELEN [110]

9514 1404 393

Answer:

  -8

Step-by-step explanation:

If α and β are roots of x^2 +5x +a = 0, then we must have ...

  (x -α)(x -β) = x^2 +5x +a

  x^2 -(α+b)x +αβ = x^2 +5x +a

Then ...

  α + β = -5

Together with the other relation between the roots, we have a system of equations in α and β.

Using the above to write an expression for β, we get ...

  β = -α -5

Substituting this into the given relation, we have an equation for α:

  2α +5(-α -5) = -1

  -3α -25 = -1 . . . . . . eliminate parentheses

  -24 = 3α . . . . . . . . add 3α +1

  -8 = α

The root α is equal to -8.

3 0
4 years ago
Find the line integral with respect to arc length ∫C(8x+5y)ds, where C is the line segment in the xy-plane with endpoints P=(7,0
puteri [66]

a. Parameterize C by

\vec r(t)=(1-t)(7,0)+t(0,5)=(7-7t,5t)

with 0\le t\le1

b. The integral is to be computed over the range of the parameter t.

c. The integral has a value of

\displaystyle\int_C(8x+5y)\,\mathrm dS=\int_0^1(8x(t)+5y(t))\|\vec r(t)\|\,\mathrm dt

\displaystyle=\int_0^1(8(7-7t)+5(5t))\|(-7,5)\|\,\mathrm dt

\displaystyle=\sqrt{74}\int_0^1(56-31t)\,\mathrm dt=\boxed{81\sqrt{\dfrac{37}2}}

4 0
3 years ago
Use the slope formula to find the missing coordinate. m =3/5 , P(3, 2) and Q(8,_)
FromTheMoon [43]
M=(y₂-y₁)/(x₂-x₁). Let  Z be the missing coordinate

3/5 = (Z - 2)/(8-3)
3/5 = (Z-2)/5
3 = Z-2      and Z =5, So Q(8,5)
5 0
3 years ago
Read 2 more answers
Davis earns a 4% commission for all furniture he sells. If David receives $7509 in commission this year , what is the dollar amo
Trava [24]

Answer:

187,725

Step-by-step explanation:

7,509/.04=187,725

5 0
4 years ago
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