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Harman [31]
2 years ago
7

1. f(x) = 8 + 11x, Find f-1 (-47) (Finding inverse functions given an input)

Mathematics
1 answer:
zavuch27 [327]2 years ago
3 0

Answer:

  f^-1(-47) = -5

Step-by-step explanation:

You want to find the value of x that gives f(x) = -47.

  -47 = 8 + 11x

  -55 = 11x

  -5 = x

Then f^-1(-47) = -5.

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The value of Maggie’s car decreased by 20% since last year when she bought it if the car is not worth 21,000 how much was the ca
leonid [27]

Answer:

Step-by-step explanation:

You would do 21,000×0.20, which equals 4,200. Since 4,200 equals 20% of 21,000, then you would do 21,000-4,200, which equals 16,800. So the car is worth $16,800 dollars this year.

6 0
2 years ago
$4.30 40% discount 6% tax
alex41 [277]
The total would be $2.73.
7 0
3 years ago
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Approximate the zeros of the function. Round to the nearest tenth if necessary. f(x) = 4x^2 + 4x - 35. Explain each step on how
svet-max [94.6K]
4x²+4x-35=0
factor: (2x+7)(2x-5)=0
2x+7=0, or 2x-5=0
2x=-7 or 2x=5
x=-3.5 or x=2.5

I don't see any rounding necessary in this case. 

when you factor ax²+bx+c, you take the two factors of a and the two factors of c, one factor of a times one factor of c, the other factor of a times the other factors, the sum of the two products make b.
in this case, the factors of 4 is 2 and 2, the factors of -35 is -5 and 7. I line them up in the following way:
2    -5

2      7
then I multiple them diagonally, the top left 2 multiplying the bottom right 7=14, and the other 2 multiplying -5=-10, 14 and -10 make a sum of 4.

if you don't get the desired sum, switch the factors up and down till you have the right combination. Note: Do not switch left and right. 

I hope this makes sense to you.
8 0
3 years ago
<img src="https://tex.z-dn.net/?f=tanx%5E%7B2%7D%20-%5Cfrac%7B1%7D%7B3%7D%20%3D0" id="TexFormula1" title="tanx^{2} -\frac{1}{3}
lianna [129]

These are expression written as a function of sine, cosine and tangent. The value of x from the given function is 4.29

Trigonometry expression

These are expression written as a function of sine, cosine and tangent.

Given

tanx² - 1/3 = 0

Add 1/3 to both sides

tanx² - 1/3 + 1/3 = 0 + 1/3

tanx² = 1/3

x² = arctan(1/3)

x² = 18.44

x =4.29

Hence the value of x from the given function is 4.29

Learn more on trig function here: brainly.com/question/24349828

#SPJ2

6 0
1 year ago
Read 2 more answers
Can I get some help with 1) plz
erik [133]
Your answer is 12 because 8*4=24 and 3*4=12                                                                                                                                                                                                                 Your answer is 12
6 0
3 years ago
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