Find the range if the domain is -1. y= 2x^2 + 5x - 17

Mathematics

1 answer:

aleksley [76]3 years ago

5 0

Answer:

I think its 17

Explanation:

Sorry If Im wrong

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Blake gives piano lessons in the evenings.

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Answer:

The correct answer is B. {0, 20, 40, 60, 80, 100, 120}

Step-by-step explanation:

1. Let's check all the information given to answer this question correctly:

Rate of each piano lesson Blake gives = US$ 20

Blake can give between 0 and 6 lessons every evening

Earnings = Number of lessons * Rate of each lesson

2. What is the range of this relation?

Let's recall that the domain of a relation is the set of all values for which the relation is defined, and the range of the relation is the set of all values that the relation takes.

It means that the domain of the relation in this case is the number of lessons that Blake can give every evening:

{0, 1, 2, 3, 4, 5, 6}

And the range of this relation is the amount Blake earns in an evening depending on the number of lessons he gives:

{0, 20, 40, 60, 80, 100, 120}

The correct answer is B. {0, 20, 40, 60, 80, 100, 120}

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4 years ago

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Given GH with endpoints G(-11, 4) and H(-1, -9), what are the coordinates of the midpoint of GH?

Sergio039 [100]

$\bf ~~~~~~~~~~~~\textit{middle point of 2 points }\\ \quad \\
\begin{array}{ccccccccc}
&&x_1&&y_1&&x_2&&y_2\\
% (a,b)
&&(~{{ -11}} &,&{{ 4}}~) 
% (c,d)
&&(~{{ -1}} &,&{{ -9}}~)
\end{array}\qquad
% coordinates of midpoint 
\left(\cfrac{{{ x_2}} + {{ x_1}}}{2}\quad ,\quad \cfrac{{{ y_2}} + {{ y_1}}}{2} \right)
\\\\\\
\left( \cfrac{-1-11}{2}~~,~~\cfrac{-9+4}{2} \right)\implies \left(-6~~,~~-\frac{5}{2} \right)\implies \left( -6,~~-2\frac{1}{2} \right)$