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Cerrena [4.2K]
3 years ago
14

Please help ! Algebra

Mathematics
2 answers:
Sladkaya [172]3 years ago
6 0

Answer:

f^-1(3) =7

Step-by-step explanation:

no calculate  f^-1 :

let : f^-1(3) =a   so : f(a) = 3

(2a-2)/4 = 3

2a-2 = 12

2a=14

a = 7

f^-1(3) =7

Simora [160]3 years ago
5 0

Answer:

C

Step-by-step explanation:

y = (2x - 2) / 4 Interchange x and y

x = (2y - 2) / 4  Multiply both sides by 4

4x = 2y - 2       Add 2 to both sides.

4x + 2 = 2y       Divide both sides by 2

4x/2 + 2/2 = 2y / 2

2x + 1 = y

Now put 3 in wherever you see an x

2*3 + 1 = y

6 + 1 = y

7 = y

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Answer: the answer is B

Step-by-step explanation:

8 0
3 years ago
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Determine the type and number of solutions of x^2 + 10x − 25 = 0.
Vitek1552 [10]

Answer:

There is exactly 1 solution and it is a double root.

Step-by-step explanation:

To find this, factor the equation and solve.

x^2 + 10x - 25 = 0

(x - 5)(x - 5) = 0

Now that we have this factored, we can set each parenthesis equal to 0 and solve separately.

x - 5 = 0

x = 5

x - 5 = 0

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Because there are two of the exact same answer, we know it to be a double root.

5 0
4 years ago
What is the value of 5 in 43.245
Reptile [31]
4➡ tens
3 ➡ ones
----------------
2➡tenths
4➡hundredths
5➡ thousandths

Anything behind the decimal point ends with a "ths" ("th" )


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6 0
3 years ago
I’m stuck on these ones too
liq [111]

Answer:

7.D) 107°

8. A) 123°

Step-by-step explanation:

To find the correct measurement of the angel the sum of the interior angels needs to equal 360°. Angels where the lines intersect with the circle would be both 90°. ( If that makes sense.)

90°+90°=180

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The same for the second one. (those two angles would also be 90° each.)

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8 0
3 years ago
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fgiga [73]

Answer:

sorry I don't know, which you good luck

Step-by-step explanation:

y-5x=7

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y= 5x+7

0=5x+7

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-5. -5

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this is just a guess

6 0
3 years ago
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