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Klio2033 [76]
3 years ago
5

If f(x)= 2x + 7, find f^-1(x). Please do not add any space between characters in your answer. For example: (3x-2)/5

Mathematics
1 answer:
scoundrel [369]3 years ago
5 0

Answer:

f−1(x)=x/2−7/2

Step-by-step explanation:

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Find the slope of the line that passes through (6, 8) and (2, 17).
Inga [223]

Answer:

-9/4

Step-by-step explanation:

Slope is equal to the change in y, over the change in x, or rise over run.

x, is the run

y, is the rise

You can substitute the coordinate numbers on the equation to find the slope. which is y2-y1/x2-x1

m= 17-(8)

——

2-(6)

Your answer will be -9/4 (it doesn’t matter where the negative goes, and there’s a negative because 2-6= -4)

Hope this helps.

8 0
2 years ago
1. Find a if x³ + ax² - x -8 is divisible by x -1​
Amanda [17]

Answer:

a = 8

Step-by-step explanation:

x-1 = 0

x = 1

let x³ + ax² -x -8 be p(x)

hence, p(1) = (1)³ + a(1)² -1 -8 = 0    (since, x-1 is a factor)

= 1 + a - 1-8

= a - 8 = 0

therefore, a = 8

6 0
3 years ago
The population of a certain species of bacteria doubles every hour. Use the following
elena55 [62]

Answer:

The bacteria will grow from 1 to 1024 in 10 hours

Step-by-step explanation:

Given

P_0 = 1

P = 1024

We have to find time

Putting values in the formula

P = P_0(2)^t\\1024=(1)(2)^t

Anything multiplied with 1 remains the same

1024=2^t\\2^{10} = 2^t

Using the property "when bases are same, the exponents can be put equivalent"

t = 10 hours

Therefore, the bacteria will grow from 1 to 1024 in 10 hours ..

7 0
3 years ago
If you roll two fair six sided dice, what is the probability that the sum is 5 or lower
lana66690 [7]

Answer: P(sum is 5 or lower) = 10/36 (not simplified) = 5/18 (simplified)

Step-by-step explanation: The event is {(1,1), (1,2), (1,3), (1,4), (2,1), (2,2), (2,3), (3,1), (3,2), (4,1)}

4 0
2 years ago
A manufacturer produces safety jackets for competitive fencers. These jackets are rated by the minimum force, in newtons, that w
Bumek [7]

Answer:

0

Step-by-step explanation:

H0 : μ = 840

H1 : μ < 840

Sample size, n = 49

Standard deviation, s = 14

Test statistic = (xbar - μ) ÷ (s/√(n))

Test statistic = (830 - 840) ÷ (14/7)

Test statistic = - 10 / 2

Test statistic = - 5

The Pvalue ;

Pvalue = P(Z < - 5) = 0 (Z probability calculator)

The Pvalue = 0

7 0
3 years ago
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