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3 years ago

Is this a function? {(8,-2),(4,-6),(6,-8),(7,5),(2,4)} Then state the domain and range.

Mathematics

1 answer:

Pani-rosa [81]3 years ago

6 0

Here looking at x in (x,y) pairs

$\\ \sf\longmapsto 8\neq4\neq6\neq 7\neq 2$

Every value has a unique image
Hence its a function

$\\ \sf\longmapsto D_f=\{8,4,6,7,2\}$

$\\ \sf\longmapsto R_f=\{-2,-6,-8,5,4\}$

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3 years ago

Solve for x: |2x + 12| = 18

erastova [34]

|2x + 12| = 18

First, break down the problem into 2 equations . / 2x + 12 = 18 and -(2x + 12) = 18
Second, solve the first equation. / $2x + 12 = 18$
Subtract 12 from both sides. / $2x = 18 - 12$
Subtract 18 - 16. / $2x = 6$
Divide both sides by 2. / $x = \frac{6}{2}$
Simplify. / $x = 3$
Third, solve the second equation. / -(2x + 12) = 18
Simplify your brackets. / $-2x - 12 = 18$
Add 12 to both sides. / $-2x = 18 + 12$
Add 18 + 12. / $-2x = 30$
Divide both sides by -2. / $x = \frac{30}{-2}$
Simplify. / $x = -\frac{30}{2}$
Simplify. / $x = -15$
Fourth, collect the solutions. / $x = -15,3$

Answer: x = -15, 3

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3 years ago

Inverse cosine of square root of 3 over 2? cos-1(square root of 3/2)

Amiraneli [1.4K]

Cos(x°) = (√3)/2
cos⁻¹[(√3)/2] = x°, that means x° = 30°

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Help with graphs please

Allisa [31]

The answer for this question would be
y = -(x-3)^2 + 2.
Hope this helps!! Have a great day!

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What is the total cost of a new car that has a price of $24,000 and a sales tax rate of 9%?

ozzi

Answer:

26,160.00

Step-by-step explanation:

24,000 + 9% = 26,160.00

Have a wonderful day! Dream a good dream of good people. :)

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3 years ago

Read 2 more answers