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BigorU [14]
3 years ago
6

Assume that the function f is a one-to-one function, (a) f(8) = 9, find f ^ -1 (9)

Mathematics
1 answer:
Annette [7]3 years ago
8 0

(a) since we are given that f(8) = 9, the inverse of 9 is simply 8. Therefore, f^-1(9) = 8.

(b) Again, f is the inverse of f^-1, therefore, you simply switch numbers, and you get that f(-3) = -7.

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5 0
3 years ago
1.3x - 10= 0.8x - 8<br> solve for x
OverLord2011 [107]

Answer:

x = 4

Step-by-step explanation:

1.3x - 10 = 0.8x - 8

Add 10 to both sides.

1.3x = 0.8x + 2

Subtract 0.8x from both sides.

0.5x = 2

Divide by 0.5.

x = 4.

Proof:

1.3x - 10 = 0.8x - 8

1.3(4) - 10 = 0.8(4) - 8

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3 0
2 years ago
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3 0
3 years ago
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95°<br> 6rº + 47°<br> r_ degrees
e-lub [12.9K]

Answer:

r = 8°

Step-by-step explanation:

95° = 6r° + 47° ( vertically opposite angles are equal)

6r° = 95° - 47°

6r = 48°

r = 48°/6

r = 8°

5 0
3 years ago
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The points (-4, 3) and (4, r) lie on a line with slope 1/2<br> Find the missing coordinate r.
melisa1 [442]

Answer:

7

Step-by-step explanation:

8 units separate -4 and 4

8 divided by 2 (which is the x of slope) is four

Four times 1 (which is y of slope) equals four

3+4 equals seven

(4,7)

7 0
3 years ago
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