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neonofarm [45]
3 years ago
6

Let f(x) = 7x - 13. Find f-1(x).

Mathematics
1 answer:
nika2105 [10]3 years ago
4 0
f(x)=7x-13 \\ \\ y=7x-13 \ \ \ |+13 \\
y+13=7x \ \ \ |\div 7 \\
x=\frac{1}{7}y+\frac{13}{7} \\ \\
\boxed{f^{-1}(x)=\frac{1}{7}x+\frac{13}{7}}
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Last One Please Help
tigry1 [53]

Answer: A. 3/5

Step-by-step explanation:

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7 0
3 years ago
I don't understand this
Deffense [45]
Don't understand what?
7 0
3 years ago
Evaluate 6²-7²+8²-9²+..+998²-999²​
Llana [10]

Answer:

-499,485.

Step-by-step explanation:

We can transform this to an arithmetic series by  working it out in pairs:

6^2 - 7^2 = (6-7)(6+7) = -13

8^2 - 9^2 = (8-9)*8+9) = -17  

10^2 - 11^2 = -1 * 21 = -21 and so on

The common difference is -4.

The number of terms in this series  is (998 - 6) / 2 + 1

= 992/2 + 1 = 497.

Sum of n terms of an A.S:

= n/2 [2a1 + (n - 1)d  

Here a1 = -13, n = 497, d = -4:

Sum = (497/2)[-26 - 4(497-1)]

= 497/2 * -2010

= -499,485.

3 0
3 years ago
Which number had a 3 with a value that is 100 times greater than the value of the 3 in 20.342?
goblinko [34]
Here the value of 3 is =3/10
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So, the number 26538,532,97436 etc. has that property.
4 0
3 years ago
Please help me thank you so much
HACTEHA [7]
I think the answer is 15
5 0
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