3 years ago

Twice the difference of a number and eight equals two

Mathematics

1 answer:

sdas [7]3 years ago

5 0

Answer:

10-8=2 i think

Step-by-step explanation:

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What could x equal in the equation 8|x| +6=86

solong [7]

Answer:

x=10, x=-10

Step-by-step explanation:

8|x| + 6 = 86

8|x| = 86 - 6

8|x| = 80

|x| = 80/8

|x| = 10

∴ x=10, x=-10

Remember that the absolute symbol turns all number inside of it positive, so |-10| = 10 and |10|=10 too.

5 0

4 years ago

If f(y) = e^(9y) + e^(-9y), find f'(y). Use exact values.

Westkost [7]

Given:

$f(y)=e^{9y}+e^{-9y}$

To find:

The f'(y).

Solution:

Chain rule of differentiation:

$[f(g(x))]'=f'(g(x))g'(x)$

Differentiation of exponential:

$\dfrac{d}{dx}e^x=e^x$

We have,

$f(y)=e^{9y}+e^{-9y}$

Differentiate with respect to y.

$f'(y)=e^{9y}\dfrac{d}{dx}(9y)+e^{-9y}\dfrac{d}{dx}(-9y)$

$f'(y)=e^{9y}\cdot 9(1)+e^{-9y}\cdot (-9)(1)$

$f'(y)=9e^{9y}-9e^{-9y}$

Therefore, the differentiation of the given function is $f'(y)=9e^{9y}-9e^{-9y}$ .

5 0

3 years ago

The answer is A true

irinina [24]

Answer:

Are you asking? Or telling me? Sorry im not sure what you want me to do...--

Step-by-step explanation:

7 0

3 years ago

Sorry I found the answer so I took it down.

agasfer [191]

Answer:

ight

Step-by-step explanation:

5 0

3 years ago

The cost to rent a moving van is $61 plus an additional $26 per hourIf a moving van rented for 17 hours, what is the cost? Write

Stels [109]

Answer:

y = 503

Step-by-step explanation:

y=mx+b

y=26(17)+61

y=442+61

y=503

7 0

3 years ago