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alekssr [168]
3 years ago
9

Four times a number added to 9 times the number is 65. What is the number?

Mathematics
2 answers:
MA_775_DIABLO [31]3 years ago
6 0

Answer: 5

Step-by-step explanation:

Let the number = x.

4x + 9x = 65

13x = 65

x = 5

noname [10]3 years ago
5 0

Answer:

5

Step-by-step explanation:

Let n represent the number. We can use this to set up an equation:

4n+9n=65

Combine like terms:

13n=65

Divide both sides by 13

n=5

The number is 5.

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3 years ago
What is 4-(-37)+(8)-(34) Pls solve brainlliest
Anvisha [2.4K]

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15

Step-by-step explanation:

First we need to remove the parenthesis

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6 0
3 years ago
Differentiate the function. f(x) = sin(9 ln(x))
gayaneshka [121]

Answer: f'(x)=\dfrac{9\cos(9\ln (x))}{x}.

Step-by-step explanation:

The given function is

f(x)=\sin(9\ln (x))

Using chain rule differentiate w.r.t. x.

f'(x)=\cos(9\ln (x))\dfrac{d}{dx}(9\ln (x))      \left[\because \dfrac{d}{dx}\sin x=\cos x\right]

f'(x)=\cos(9\ln (x))\left[9\dfrac{d}{dx}(\ln (x))\right]

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3 years ago
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