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Montano1993 [528]
3 years ago
7

Match the range of the function f(x) = x2 + 2x − 1 to its domain.

Mathematics
1 answer:
umka21 [38]3 years ago
5 0

Answer: (2,7) (-2,-9) (3,11) (-3,-13)

Step-by-step explanation:

(2)(2)+(2)(2)-1 = 7

(2) (-2)+(2)(-2)-1 = -9

(3)(2)+(2)(3)-1 = 11

(-3)(2)+(2)(-3)-1 = -13

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A
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3 years ago
X is inversely proportional to the square root of y
omeli [17]

Answer: 4

Step-by-step explanation:

The formula for inverse proportion is x = k / y. Since x is inversely proportional to the square root of y. This will be:

x = k / ✓y

When x = 12, y = 9

We have to calculate the constant of proportionality, k which will be:

12 = k / ✓9

12 = k / 3

k = 12 × 3

k = 36

To find the value of x when y = 81 will be:

x = k / ✓y

x = 36 / ✓81

x = 36 / 9

x = 4

Therefore, x = 4 when y = 81.

4 0
3 years ago
Please help me with this problem! (Scam answers will be reported)
matrenka [14]

Answer:

C looks good. if u have 2 attempts and c wrong it has to be B

4 0
3 years ago
Malia is planting a garden in her yard.The dimensions are represented by x+4 feet and x+8 feet. She needs fencing to go around t
Kobotan [32]

Answer:

I think you would have to do 2(x+4)+2(x+8) because it it talking about perimeter and if you imagine a square or rectangle, there are four sides, so just adding x+4 and x+8 wont be the whole perimeter. So, if you solve the expression 2(x+4)+2(x+8) it will give you 4x+24 XD

Step-by-step explanation:

4 0
3 years ago
Simplify: -4(x - 6) + 3(a - 7)
Korolek [52]

We have -4(x - 6) + 3(a - 7) = -4x + 24 + 3a - 21 = -4a + 3a + 3

so the answer is B

ok done. Thank to me :>

7 0
3 years ago
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