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○ Domain: 3, 10, 15 Range: 7, 18, 21

○ Step 3

○ Yes, for every x-value, there is one and only one y-value.

Step-by-step explanation:

- Range is the solution set of y-values. Domain is the solution set of x-values.

- The equation of RESULTS FROM the equation of when like-terms are combined.

- A function cannot have replicated x-coordinates. All the other answer choices are false, so you would pick this one.

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m∠cdf = 43° , m∠gdf = 114°, m∠gde = 23°, m∠edh = 23° , m∠cdh = 157°

step-by-step explanation:

since, it is given that de bisects the angle gdh ⇒ de divides the angle gdh into two equal angles.

⇒ m∠gde = m∠edh

⇒ 8·x   - 1 = 6·x + 5

⇒ x = 3

so, m∠gde = 8·x - 1 = 23°

and m∠edh = 23°

now, it is given ∠cde is an straight angle so, m∠cde = 180°

⇒ m∠cdf + m∠fdg + m∠gde = 180°

⇒ 43° + m∠fdg + 23° = 180°

⇒ m∠fdg = 114°

again, m∠cde = m∠cdh + m∠edh = 180°

m∠cdh + 23° = 180°

⇒ m∠cdh = 157°

d is the answer

step-by-step explanation: