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Anna007 [38]
3 years ago
6

If f(x)=3x+9,what is f−1(x)? 

Mathematics
1 answer:
kotegsom [21]3 years ago
8 0
F inverse? then :
let's consider 3x + 9 as y.
so :
y = 3x + 9
y - 9 = 3x
x = y/3 - 3
now replace y with x and you get the inverse.
f^-1 (x) = x/3 - 3
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116 miles in 8 hours is what miles per hour.
yulyashka [42]

Answer:

14.5

Step-by-step explanation:

116/8

6 0
3 years ago
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Find the measure of Angle B<br><br> A. 50°<br> B. 55°<br> C. 60°<br> D. 65°
kondaur [170]

Option B. 55° is the correct answer

Step-by-step explanation:

"The sum of interior angles of a triangle is always 180°"

Given

m∠A=(3x+1)°

m∠B=(2x-1)°

m∠C = 40°

We know that

m∠A+m∠B+m∠C=180°

Putting the values of angles

(3x+1) +(2x-1) +40 = 180\\3x+1+2x-1+40 = 180\\5x+40=180\\

Subtracting 40 from both sides

5x+40-40=180-40\\5x=140

Dividing both sides by 5

\frac{5x}{5} = \frac{140}{5}\\x=28

We have to find Angle B,

So

m∠B = 2x-1 = 2(28)-1 = 56-1 = 55°

Hence,

m∠B=55°

Option B. 55° is the correct answer

Keywords: Triangle, Interior angles

Learn more about triangles at:

  • brainly.com/question/12896802
  • brainly.com/question/12973601

#learnwithBrainly

8 0
3 years ago
9- (-4) =<br> 14 -9 =<br> (-4) - (-5) =<br> -7 - 9 =
AlekseyPX

Answer:

Step-by-step explanation:

9 + 4 = 13 Two minus' make a plus

14-9 = 5     this is just subtraction

-4 + 5 = 1   two minus's make a plus.

-7-9 = -16

3 0
3 years ago
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yan [13]

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This happens for all possible couples in your case:


2+9=11>10


2+10=12>9


9+10=19>2

3 0
3 years ago
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Paladinen [302]

Answer:

Uhhhh si he counted 40 cars so just do 40 times 9 which is 360

6 0
3 years ago
Read 2 more answers
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