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3 years ago

Which equation is the inverse of y=9x^2-4

Mathematics

2 answers:

Aleks [24]3 years ago

8 0

The answer is 9x^2-4=y because when you inverse an equation you reverse it.

statuscvo [17]3 years ago

8 0

First swap the x and y variable, then isolate y.

y = 9x^2 - 4
x = 9y^2 - 4
x + 4 = 9y^2
(x+4)/9 = y^2

plus or minus
$\sqrt{((x + 4) \div 9} = y$

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2 years ago

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Answer:

$\text{r}=5.5\text{c}-20$

Step-by-step explanation:

GIVEN: On a $40$ question test students gain $6$ points for each correct answer and lose $0.5$ points on each incorrect answer. If everyone required to give an answer to each question.

TO FIND: the formulas that describes how a student's raw score, r, depends on the number of correct answers he or she provided, c.

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ormulas that describes how a student's raw score, r, depends on the number of correct answers he or she provided, c is $\text{r}=5.5\text{c}-20$

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3 years ago