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3 years ago

42 is 9 more than 3 times a number. what is the number?

Mathematics

2 answers:

Roman55 [17]3 years ago

6 0

_Award brainliest if helped!
Let Unknown number be X ,

42 = 9 + 3(X)
42-9 = 3X
33 = 3X
X = 11
The number is 11

yuradex [85]3 years ago

3 0

Equation: 3x+9=42

3x=42-9=33

<span>Answer: x=33/3=11

Hope this helps!!
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3 years ago

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Therefore the rate change of distance between the car and the person at the instant, the car is 24 m from the intersection is 12 m/s.

Step-by-step explanation:

Given that,

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From Pythagorean Theorem,

(The distance between car and person)²= (The distance of the car from intersection)²+ (The distance of the person from intersection)²+

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$\frac{dy}{dt}=\frac{1}{2\sqrt{x^2+100}}. 2x\frac{dx}{dt}$

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Since the car driving towards the intersection at 13 m/s.

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$\therefore \frac{dy}{dt}=\frac{x}{\sqrt{x^2+100}}.(-13)$

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