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SVEN [57.7K]
3 years ago
5

Help me im so sad determine the values of X for which f(x) is defined ​

Mathematics
1 answer:
eimsori [14]3 years ago
4 0

Answer:

f(x) =  \frac{(2x - 1)(3x - 2)}{9x - 4}  \\  open \: brackets \\  =  \frac{(6 {x}^{2} - 4x - 3x + 2) }{9x - 4}  \\  =  \frac{6 {x}^{2} - 7x + 2 }{9x - 4}  \\ let \: x \: be \: 1 \\ f(1) =  \frac{(6 - 7 + 2)}{(9 - 4)}  \\  =  \frac{1}{5}

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9.3, 13.3, 15.3
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3 years ago
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Let T:R²->R² be a linear transformation ,and assume that T (1,2)=(-1,1) and T(1,-1)=(2,3)
zavuch27 [327]

Answer:

(-4,-1)

Step-by-step explanation:

We are given T(1,2)=(-1,1) and T(1,-1)=(2,3) and T is a linear transformation.

This implies for scalars a and b that

T(a(1,2)+b(-1,1))=aT(1,2)+bT(-1,1)

T((a,2a)+(-b,b))=a(-1,1)+b(2,3)

T((a-b,2a+b))=(-a,a)+(2b,3b)

T((a-b,2a+b))=(-a+2b,a+3b)

This means we should be able to solve the system below to find a and b for T(3,3):

a-b=3 and 2a+b=3

Add equations to eliminate b and solve for a:

3a=6

Divide 3 on both sides:

a=2

If a-b=3 and a=2, then b=-1.

Plug in a=2, b=-1:

T((a-b,2a+b))=(-a+2b,a+3b)

T((2--1,2×2+-1)=(-2+2×-1,2+3×-1)

T(3,3)=(-4,-1).

4 0
3 years ago
A certain number was multiplied by 7. 4 was taken away from the product. Finally, that difference was then divided by 9, resulti
marin [14]

Answer:

7

Step-by-step explanation:

To solve this, we have to work backwards. If you divide something by 9, and it equals 5, to figure out the number, we need to multiply by 9. 5*9= 45. If four was taken away, we have to add it to 45, which is 49. If a number *7 is 49, then we have to divide by 7 to get the answer. 49/7=7  

7 0
3 years ago
PLS HELP 40 POINTS
kupik [55]

Answer:

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Step-by-step explanation:

The area is the product of two dimensions.

If the ratio of sides is k, then the ratio of areas is k²

<u>We have:</u>

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  • k² = 25
  • k = √25
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Correct choice is C

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