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aleksklad [387]
3 years ago
15

Can someone please help me with ALL of these questions

Mathematics
1 answer:
lora16 [44]3 years ago
5 0
37. B: Negative inverse, the product of the gradients is -1

38. C: decreases

39. B: the sum of all divided by 9
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I need help with this question
zvonat [6]

Answer:

Option B is correct

Step-by-step explanation:

Given:

f(x) = -20x^2 +14x +12 and

g(x) = 5x - 6

We need to find f/g and state its domain.

f/g = -20x^2 +14x +12/5x - 6

Taking -2 common from numerator:

f/g = -2(10x^2 - 7x - 6) / 5x -6

Factorize 10x^2 - 7x - 6= 10x^2 - 12x +5x -6

Putting in the above equation

f/g = -2(10x^2 - 12x +5x -6)/ 5x -6

f/g = -2(2x(5x-6) + 1 (5x-6)) / 5x-6

f/g = -2 ( (2x+1)(5x-6))/5x-6

cancelling 5x-6 from numerator and denominator

f/g = -2(2x+1)

f/g = -4x -2

The domain of the function is set of all values for which the function is defined and real.

So, our function g(x) = 5x -6 and domain will be all real numbers except x = 6/5 as denominator will be zero if x=5/6 and the function will be undefined.

So, Option B is correct.

8 0
3 years ago
Read 2 more answers
The faces of a triangular pyramid have a base of 5 cm and height of 11 cm. What is the lateral area of the pyramid?
horrorfan [7]
I think 55 because you would multiply 11×5
7 0
3 years ago
What is the surface area? 5 in 4 in 2 in
Dennis_Churaev [7]

I think the Answer is 76 in^2

Hope this helps

8 0
3 years ago
How to find canonical form of equation of a line then general form is given
lisabon 2012 [21]
It is a math mathematical form of objects natural stance, to find it you need the positive integer and its finite sequence of digits.
4 0
3 years ago
Express the radical using the imaginary unit, i.
MrMuchimi

Answer:

±3i

Step-by-step explanation:

Given the value ±√-9, we are to express the value using the imaginary number 'I'

±√-9 = ±√9×-1

= ±√9 × √-1

In complex number, √-1 = i

The expression becomes;

±√9 = ±3 × i

±√9 = ±3i

Hence the value in simplified form is ±3i

7 0
3 years ago
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